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1. Negative Log / Negative Logarithm on 22.08.2026
2. Ciphers on 19.07.2026
1. Variant Beaufort Cipher
2. Keyed Caesar Cipher
3. AMSCO Cipher
3. Ciphers on 19.04.2026
1. Alberti Cipher
2. Double Transposition Cipher
3. Enigma machine Cipher
4. Four Square Cipher
5. Gronsfeld Cipher
6. Hill Cipher
7. Kamasutra Cipher / Vatsyayana Cipher
8. Multiplicative Cipher / Decimation Cipher
9. Morse Code Translator
10. Playfair Cipher
11. Porta Cipher
12. Three Square Cipher
13. Two-Square Cipher / Double Playfair Cipher
4. Ciphers on 08.04.2026
1. A1Z26 Cipher (Letter to number Cipher)
2. ADFGVX Cipher
3. ADFGX Cipher
4. Affine Cipher
5. Atbash Cipher
6. Autokey Cipher / Autoclave Cipher
7. Bacon Cipher
8. Beaufort Cipher
9. Bifid Cipher
10. Caesar Cipher / Additive cipher / Shift Cipher
11. Chaocipher
12. Columnar transposition Cipher
13. Nihilist Cipher
14. Polybius Square Cipher
15. Rail fence Cipher
16. ROT-5 Cipher
17. ROT-13 Cipher
18. ROT-18 Cipher
19. ROT-47 Cipher
20. ROT-N Cipher / ROT Cipher
21. Running Key Cipher
22. Substitution Cipher / Monoalphabetic Substitution Cipher
23. Tap code Cipher / Knock code Cipher
24. Trifid Cipher
25. Trithemius Cipher
26. Vigenere Cipher
5. Numerical Integration on 24.03.2026
1. Left Riemann Sum for a table
2. Right Riemann Sum for a table
3. Midpoint Rule for a table
4. Left endpoint approximation for a table
5. Right endpoint approximation for a table
1. Left Riemann Sum for a function
2. Right Riemann Sum for a function
3. Midpoint Rule for a function
4. Left endpoint approximation for a function
5. Right endpoint approximation for a function
6. Missing Operators solver on 20.02.2026
7.1 Increasing and decreasing functions at point on 18.02.2026
7.2 Increasing and decreasing intervals
8.1 Second derivative test for Local maxima and minima on 17.02.2026
8.2 First derivative test for Local maxima and minima
9. Polar to Rectangular form of complex number on 16.02.2026
10. Solve (2nd order) numerical differential equation using on 04.02.2026
1. Improved Euler method / Modified Euler method
2. Midpoint Euler method
3. Taylor Series method
11. For angle `theta`, find values of all six trigonometric functions on 16.01.2026
12. Square root by Babylonian method on 10.01.2026
13. Cube root by Babylonian method
14. Assignment Problem using LP Model Formulation on 07.01.2026
15. Transportation Problem using LP Model Formulation
16. Transshipment Problem on 05.01.2026
17. Fermat's Little Theorem on 29.12.2025
18. Raw Moments to Central Moments conversion (on 24.12.2025)
The first four moments of a distribution about the value 4 are 1,4,10,45. Calculate the first four moments about mean and origin
19. Raw Moments and Central Moments for grouped data on 23.12.2025
20. Raw Moments and Central Moments for ungrouped data
21. Thomas algorithm method on 12.11.2025
22. Inverse Power Method for dominant eigenvalue on 11.11.2025
23. Verify polynomial is divided by another polynomial or not on 06.10.2025
24. Determinant by gaussian elimination on 05.08.2025
25. Determinant by Expanding along row / column
26. Determinants using montante (bareiss algorithm)
27. Determinant using Leibniz formula
28. Complex Number on 10.06.2025
1. Adding complex numbers
2. Subtracting complex numbers
3. Multiplying complex numbers
4. Dividing complex numbers
5. Real part of complex number
6. Imaginary part of complex number
7. Conjugate of complex number
8. Modulus / Magnitude / Absolute value of complex numbers
9. Multiplicative inverse of complex numbers
10. Reciprocal of complex number
11. Argument / Arg / Angle / Phase of complex number
12. Polar form of complex number
13. Exponential form of complex number
14. Square root of complex number
15. Cube root of complex number
16. Powers of complex numbers
17. Roots of complex numbers
29. Polynomial on 28.05.2025
1. Identify the like terms in algebraic expression
2. Classify polynomial as monomials, binomials, trinomials, or other polynomial
3. Classify polynomial as linear, quadratic and cubic polynomials
30. Random number on 05.05.2025
1. Random number generator
2. Random string generator
3. Random password generator
4. Random list generator
5. Roll dice
6. Flip coin toss
7. Random card shuffle
8. Random binary number generator
9. Random octal number generator
10. Random hex number generator
11. Random n digit number generator
31. HCF LCM on 03.05.2025
1. HCF of decimal numbers
2. LCM of decimal numbers
3. HCF of fractions
4. LCM of fractions
32. Standard form on 02.05.2025
1. Standard form of a number
2. Standard form of rational number
3. Standard form of linear equations in one variable
4. Standard form of linear equations in two variables
5. Standard form of linear equations (any variables)
6. Standard form of quadratic equation
7. Standard form of cubic polynomial
8. Standard form of polynomial
33. Logarithm on 15.04.2025
1. Convert from exponential to logarithmic form
2. Convert from logarithmic to exponential form
34. Angles on 26.02.2025
1. Complementary angle
2. Supplementary angle
3. Reference angle
4. Decide Types of angles based on measurement (Right angle, Acute angle, Obtuse angle)
5. Quadrant of angle
35. Decimal number on 18.11.2024
1.1 Decimal to Fraction
1.2 Fraction to Decimal
1.3 Decimal to Percent
1.4 Percent to Decimal
1.5 Decimal to Standard form
1.6 Standard form to Decimal form
2. Expanded form of a number
3. Succeeding number / Successor
4. Preceding number / Predecessor
5. Even or odd number
6. Comparing Numbers / Greater Than Or Less Than
7. Minimum number
8. Maximum number
9. Ascending, Descending order of numbers
10. Rounding Numbers
11. Classifying numbers (Rational,Irrational,Real,Natural,Integer)
12. Terminating or non terminating decimal expansion
13. Additive inverse
14. Multiplicative inverse
15. Opposite number
16. Reciprocal number
17. Absolute value of a number
18. Plotting numbers on a number line
19. Like and Unlike decimals
20. Convert unlike decimals to like decimals
21. +, -, *, / of numbers
22. Model +, - of numbers
23. Simplify expression
36. Rational Zeros Theorem to find all possible rational roots of a polynomial on 04.10.2024
37. Scientific notation on 16.08.2024
1. Convert Scientific notation to Decimal
2. Convert Decimal to Scientific notation
3. Add, subtract, multiply and divide of Scientific notation
38. Fraction on 05.08.2024
1. Numerator and Denominator Fractions
2. Classify Fractions (Proper and Improper Fractions)
3. Like and Unlike fractions
4. Model Fractions (Visual Fractions)
5. Reducing Fractions
6. Equivalent Fractions
7. How many eighths are equivalent to 1/2
8. Mixed Number to Decimal
9. Decimal to Mixed Number
10. Fraction to Percent (Mixed Number to Percent)
11. Percent to Fraction (Percent to Mixed Number)
12. Improper fraction to Mixed number
13. Mixed Number to Improper Fraction
14. Reciprocal of a fraction
15. LCD of fractions
16. Convert unlike fraction to like fraction
17. Comparing fractions
18. Ascending and descending order of fractions
19. Adding Fractions
20. Subtracting Fractions
21. Multiplying Fractions
22. Dividing Fractions
23. Add, subtract, multiply and divide of Mixed numbers
24. Visual Model for Adding, Subtracting of Fractions
25. Simplifying Complex Fractions
39. Prime numbers on 26.06.2024
39.1 Is 31 a prime number
39.2 Which of the following is a prime number 13,48,49,23,45,47
39.3 Which of the following is a composite number 13,19,22,31
39.4 First 1000 prime numbers
39.5 5th prime number
39.6 Prime numbers from 1 to 1000
39.7 Greatest prime number between 1 and 100
39.8 What is the next 2 prime number after 37
39.9 What is the previous 2 prime number before 37
39.10 What is the largest 2 digit prime number
39.11 What is the smallest 4 digit prime number
39.12 Express 21 as the sum of three prime numbers
39.13 are 25 and 27 co-prime numbers
39.14 Find all co-prime numbers from 1 to 100
39.15 are 11 and 13 twin primes
39.16 Find all twin prime numbers between 1 to 100
40. Multiples of a number on 26.06.2024
40.1 Find Multiple of 8 using Multiplication method
40.2 Find Multiple of 8 using Repeated addition method
40.3 Find the first 6 Multiple of 8
40.4 Find the sum of first 12 Multiple of 12
40.5 Find the average of first 12 Multiple of 12
40.6 Find Multiple of 7 that are less than or equal to 56
40.7 Find Multiple of 12 that are between 20 and 70
40.8 Find the smallest Multiple of 13 greater than 1000
40.9 Find the largest Multiple of 7 less than 1000
40.10 How many Multiple of 7 between 100 and 1000
40.11 Is 104 a multiple of 8
41. Factors and Prime factors of a number on 11.06.2024
41.1 Prime factorization by Division method
41.2 Prime factorization using Factor tree method
41.3 Prime factorization using the Ladder method
41.4 Factors by Division method
41.5 Factors by Multiplication method
41.6 Factor Pairs
42. HCF and LCM of numbers on 24.05.2024
42.1 HCF by Listing Method
42.2 HCF by Prime Factorization Method
42.3 HCF by Division Method
42.4 HCF by Repeated Division Method
42.5 LCM by Listing Method
42.6 LCM by Prime Factorization Method
42.7 LCM by Division Method
42.8 LCD
42.9 Common Factors by Listing Method
43.1 Log / Logarithm on 28.04.2024
43.2 ln - Natural log
43.3 Antilog / Antilogarithm
43.4 Anti Natural log
44. The Equation for the terminal Side `theta` is `2x+y=0, x>=0`. Find the value of all six trigonometric functions on 25.04.2024
45. Net Present Value (NPV) on 19.03.2024
46. Amortization on 14.03.2024
47.1 Future value using Simple Interest on 05.03.2024
47.2 Future value using Compound Interest
47.3 Future value of Annuity
47.4 Future value of Annuity Due
47.5 Present value using Simple Interest
47.6 Present value using Compound Interest
47.7 Present value of Annuity
47.8 Present value of Annuity Due
47.9 Contineous Compounding
48.1 Future value factor
48.2 Present value factor
48.3 Discount factor
48.4 Future value factor table
48.5 Present value factor table
48.6 Discount factor table
49.1 Effective interest rate
49.2 Nominal interest rate
50.1 Simple bar graph on 26.02.2024
50.2 Multiple bar graph
50.3 Percentage bar graph
50.4 Simple stacked bar chart
50.5 Percentage stacked bar chart
50.6 Pie Chart
50.7 Donut Chart
50.8 Scatter Plot / XY Graph
50.9 Line Graph
51.1 Ogive (cumulative frequency curve) on 25.01.2024
51.2 Frequency polygon with the help of Histogram
51.3 Frequency curve with the help of Histogram
52. Queueing Theory on 06.01.2024
52.1 M/M/1 Queuing Model
52.1 M/M/1/N Queuing Model (M/M/1/K)
52.1 M/M/1/N/N Queuing Model (M/M/1/K/K)
52.2 M/M/s Queuing Model (M/M/c)
52.2 M/M/s/N Queuing Model (M/M/c/K)
52.2 M/M/s/N/N Queuing Model (M/M/c/K/K)
52.2 M/M/Infinity Queuing Model
53. Binomial expansion `(2x+3y)^5` on 26.09.2023
54. Words to Numbers Converter on 24.09.2023
55. Oddment method on 29.07.2023
56. Index Number on 16.07.2023
1.1 Fixed base method
1.2 Chain base method
2. Unweighted Index Number
2.1 Simple Aggregative Method
2.2 Simple Average of Price Relative Method (using the arithmetic mean)
2.3 Simple Average of Price Relative Method (using the geometric mean)
3.1 Fixed base method for bivariate grouped data
3.2 Chain base method for bivariate grouped data
4.1 Conversion of fixed base index numbers into chain base index numbers
4.2 Conversion of chain base index numbers into fixed base index numbers
5. Weighted Index Numbers
5.1 Laspeyre's price index number
5.2 Paasche's price index number
5.3 Fisher's price index number
5.4 Marshall Edgeworth's price index number
5.5 Dorbish-Bowley's price index number
5.6 Kelly's price index number
5.7 Walsh's price index number
6.1 Weighted aggregate method
6.2 Weighted average of price relatives method
7. Cost of living Index number
7.1 Aggregate expenditure method
7.2 Family budget method
57. Mode using Grouping Method on 12.12.2022
58. Construct an ungrouped frequency distribution table on 28.11.2022
59. Construct a grouped frequency distribution table
60. Maximum, Minimum for ungrouped data
61. Sum, Length for ungrouped data
62. Range, Mid Range for ungrouped data
63. Stem and leaf plot for ungrouped data
64. Ascending order, Descending order for ungrouped data
65. Run Length Encoding on 21.11.2022
66. Run Length Decoding
67. Modulo on 15.11.2022
68. Power Mod / Fast modular exponentiation
69. Coding Decoding on 19.10.2022
70. Ridder's Method on 23.05.2022
71. Vector triple product on 13.04.2022
72. Law of Sines Calculator on 13.04.2022
73. Law of Cosines Calculator
74.1 Sine Calculator on 11.04.2022
74.2 Cosine Calculator
74.3 Tangent Calculator
74.4 Cosecant Calculator
74.5 Secant Calculator
74.6 Cotangent Calculator
75.1 Inverse Sine Calculator
75.2 Inverse Cosine Calculator
75.3 Inverse Tangent Calculator
75.4 Inverse Cosecant Calculator
75.5 Inverse Secant Calculator
75.6 Inverse Cotangent Calculator
76.1 Hyperbolic Sine Calculator
76.2 Hyperbolic Cosine Calculator
76.3 Hyperbolic Tangent Calculator
76.4 Hyperbolic Cosecant Calculator
76.5 Hyperbolic Secant Calculator
76.6 Hyperbolic Cotangent Calculator
77.1 Inverse Hyperbolic Sine Calculator
77.2 Inverse Hyperbolic Cosine Calculator
77.3 Inverse Hyperbolic Tangent Calculator
77.4 Inverse Hyperbolic Cosecant Calculator
77.5 Inverse Hyperbolic Secant Calculator
77.6 Inverse Hyperbolic Cotangent Calculator
78. If `x+y+z=1,xy+yz+zx=-1` and `xyz=-1` then find `x^3+y^3+z^3` on 25.02.2022
79. If `alpha` and `beta` are roots of equation `2x^2-3x-6=0`, then find `alpha^2+beta^2` on 29.01.2022
80. If `alpha` and `beta` are roots of equation `2x^2-3x-6=0`, then find equation whose roots are `alpha^2` and `beta^2`
81. Find value of `k` for which `2x^2+kx+2=0` has real roots
82. Wrong Number series on 06.01.2022
83. Missing Number Series
84. Alphabet series on 13.12.2021
85. Missing Letter Series
86. Richardson extrapolation formula for differentiation on 11.12.2021
87. Find other polynomial when one polynomial its GCD and LCM are given
88. Lattice Multiplication on 08.12.2021
89.1 Missing Digits solver, fill in the blank solver on 06.11.2025
89.2 Alphametic Puzzles, Algebrograms, Cryptarithms, Cryptograms solver on 02.12.2021
90. Restoring Division Algorithm For Unsigned Integer on 29.11.2021
91. Non-Restoring Division Algorithm For Unsigned Integer on 01.12.2021
92 Solve (2nd order) numerical differential equation using (on 17.10.2021)
1. Euler method
2. Runge-Kutta 2 method
3. Runge-Kutta 3 method
4. Runge-Kutta 4 method
93.1 Find the value of h,k for which the system of equations has a Unique solution on 16.10.2021
93.2 Find the value of h,k for which the system of equations has Infinite solution
93.3 Find the value of h,k for which the system of equations has No solution
93.4 Find the value of h,k for which the system of equations is consistent
93.5 Find the value of h,k for which the system of equations is inconsistent
93.6 Determine whether the system of linear equations has a Unique solution
93.7 Determine whether the system of linear equations has Infinite solution
93.8 Determine whether the system of linear equations has No solution
93.9 Determine whether the system of linear equations is consistent
93.10 Determine whether the system of linear equations is inconsistent
94. Chinese Remainder Theorem on 08.08.2021
95. Extended Euclidean Algorithm
96. Euclid's Algorithm
97. Modular multiplicative inverse
98. Remainder theorem on 04.08.2021
99. Singular Value Decomposition (SVD) Code improved on 29.07.2021
100. Numerical Differentiation first order and second order using on 14.07.2021
1. 2 point Forward, Backward, Central difference formula
2. 3 point Forward, Backward, Central difference formula
3. 4 point Forward, Backward, Central difference formula
4. 5 point Forward, Central difference formula
101. Time Series and Forecasting on 07.07.2021
1. Simple Moving Average
2. Weighted Moving Average
3. Single Exponential Smoothing
4. Simple Moving Average forecast
5. Weighted Moving Average forecast
6. Single Exponential Smoothing forecast
102. Cubic spline interpolation on 28.06.2021
103. Missing terms in interpolation table on 27.05.2021
104. Lagrange's Inverse Interpolation formula on 24.05.2021
105. on 11.05.2021
1. LU decomposition using Doolittle's method of Matrix
2. LU decomposition using Crout's method of Matrix
3. Solve systems of linear equations using Doolittle's method
4. Solve systems of linear equations using Crout's method
106. Statistics on 09.04.2021
1. Five number summary for ungrouped data
2. Box and Whisker Plots for ungrouped data
3. Five number summary for grouped data
4. Box and Whisker Plots for grouped data
107. Verifying if two functions are inverses of each other on 03.04.2021
108. Polynomial on 13.03.2021
1. Polynomial in ascending order
2. Polynomial in descending order
3. Degree of a polynomial
4. Leading term of a polynomial
5. Leading coefficient of a polynomial
6. Determine expression is a polynomial or not
7. Zeros of a polynomial
109. is Negative Definite Matrix on 28.02.2021
110. Row Space on 13.02.2021
111. Column Space
112. Null Space
113. Percentage on 06.02.2021
114. Arithmetic Progression
115. Geometric Progression
116. Simple Interest
117. Compound Interest
118. Relaxation method on 22.01.2021
119. Karnaugh Map method (Kmap) on 21.01.2021
120. Quine-McCluskey method
121. Halley's Method on 11.01.2021
122. Steffensen's Method
123. is Derogatory Matrix on 03.11.2020
124. Functions on 30.07.2020
1. Domain of a function
2. Range of a function
3. Inverse of a function
4. Properties of a function
5. Vertex of a function
6. Focus of a function
7. axis symmetry of a parabola
8. Directrix of a function
9. Intercept of a function
10. Parity of a function
11. Asymptotes of a function
125. on 26.07.2020
1. solve equation `3/y+14/x=5,21/x-1/y=2` by taking `1/x=X` and `1/y=Y`
2. solve equation `3x+14y=5xy,21y-x=2xy` by dividing `xy`
126. on 09.07.2020
1. Taylor Series method
2. cuberoot(48) using iteration method
127. Numerical Interpolation using on 06.07.2020
11. Hermite's formula
128. Numerical Interpolation using on 24.06.2020
6. Gauss Forward formula
7. Gauss Backward formula
8. Stirling's formula
9. Bessel's formula
10. Everett's formula
129. Numerical Differentiation using on 24.06.2020
4. Newton's Divided Difference formula
5. Lagrange's formula
6. Stirling's formula
7. Bessel's formula
130. Numerical Integration using on 24.06.2020
4. Boole's Rule
5. Weddle's Rule
131. Sequencing Problems - Processing 2 Jobs Through m Machines Problem on 17.04.20
132. SOR (Successive over-relaxation) method on 11.04.20
133. For P(3,4), find the value of all six trigonometric functions on 29.03.20
134. Bairstow method on 03.03.20
135. 3 Missing frequencies when Mean or Median or mode are given on 31.01.2020
136. fog(x)=(x+2)/(3x), f(x)=x-2. Find g(x)
137. gof(x)=1/x^2, f(x)=2+x^2. Find g(x).
138. Data envelopment analysis (DEA method) on 05.01.2020
139. Determinants using Sarrus Rule on 23.10.19
140. Determinants using properties of determinants
141. Hyperbolic functions implemented on 26.09.19
142. Five number summary
143. diagonally dominant equation
144. set builder notation (Code improved) on 19.09.19
145. Stem and leaf plot
146. Partial Fraction bug solved on 13.09.19
147. PERT and CPM Network diagram (improved) on 26.08.19
147. BCD and Excess 3 Addition and Subtraction using 9's or 10's complement Method on 22.08.19
1. BCD Addition
2. BCD Subtraction using 9's complement
3. BCD Subtraction using 10's complement
4. Excess 3 Addition
5. Excess 3 Subtraction using 9's complement
6. Excess 3 Subtraction using 10's complement
149. Conversion on 22.08.19
1. Decimal To BCD
2. Binary To BCD
3. Octal To BCD
4. Hexadecimal To BCD
5. BCD To Decimal
6. BCD To Binary
7. BCD To Octal
8. BCD To Hexadecimal
9. BCD To Excess 3
10. Decimal To Excess 3
11. Binary To Excess 3
12. Octal To Excess 3
13. Hexadecimal To Excess 3
14. Excess 3 To Decimal
15. Excess 3 To Binary
16. Excess 3 To Octal
17. Excess 3 To Hexadecimal
18. Excess 3 To BCD
19. Decimal To Gray code
20. Binary To Gray code
21. Octal To Gray code
22. Hexadecimal To Gray code
23. Gray code To Decimal
24. Gray code To Binary
25. Gray code To Octal
26. Gray code To Hexadecimal
150. Logarithmic equations 07.08.19
Unitary Method (Chain Rule) 18.07.19
151. If 17 books cost Rs 306, what do 29 books cost?
152. If 5 artical cost Rs 90, the cost of 9 artical is?
153. If 20 persons can do a piece of work in 7 days, then the number of persons required to complete the work in 28 days is?
154. If 5 men working 6 hours a day can reap a field in 20 days, in how many days will 15 men reap the field, working 8 hours a day?
Probability 17.07.19
155. 3 unbiased coins are tossed, What is the probability of getting exactly 2 tails
156. In a throw of two dice, What is the probability getting a total of 10 or 11
157. two card is drawn at random from a pack of 52 cards. What is the probability that the drawn cards are both aces
158. A bag contains 5 blue and 4 black balls. Three balls are drawn at random, what is the probability that 2 are blue and 1 is black?
Age word problems 16.07.19
159. 10 years ago, A was 4 times as old as B. 10 years hence, A will be 2 times as old as B. At present, A's age and B's age is ?
160. The ratio of Meena's age and Kamla's age is 3 : 5 and the sum of Meena's age and Kamla's ages is 80 years. The ratio of their ages after 10 years will be ?
Quadratic equations (Solution by considering m) on 10.07.19
161. `(x^2+1/x^2)-8(x+1/x)+14=0`
162. `4((4x+1)/(4x-1))^(2)+(4x+1)/(4x-1)=3`
163. `12((x)/(x-1))+12((x-1)/(x))=25`
164. Vector Algebra on 08.07.19
1. Addition/Subtraction of two vectors
2. Scalar Multiplication of vectors
3. Dot Product of two vectors
4. Cross Product of two vectors
5. Magnitude of a vector / length of a vector
6. Unit vector
7. Direction cosines of a vector
8. Component form of a vector given two points
9. Angle between two vectors
10. Vector projection
11. Orthogonal vectors
12. Collinear vectors
13. Coplanar vectors
14. Scalar triple product
15. Area of triangle determined by two vectors
16. Area of parallelogram determined by two vectors
17. Volume of pyramid determined by vectors
18. Volume of Parallelepiped determined by vectors
19. Decomposition of vector in basis
20. Linearly independent or dependent vectors
165. Normal Distribution Table
166. t Distribution Table
167. Chi square Distribution Table
168. F Distribution Table
169. Binomial Distribution Table
170. F test
171. t-test
172. Standard error
173. Sign test
174. Mann whitney U test
175. Kruskal-wallis test
176. Chi square test
177. Median test
178. Mood's Median test
179. Cholesky decomposition method of a System of linear equations on 06.06.19
180. Covariance - Population Covariance, Sample Covariance for bivariate grouped data on 03.06.19
181. Covariance - Population Covariance, Sample Covariance for bivariate grouped data on 03.06.19
182. LU decomposition method / Crout's method of a System of linear equations on 30.05.19
183. One-way ANOVA on 09.05.19
184. Two-way ANOVA on 09.05.19
185. Power Method for dominant eigenvalue on 28.04.19
186. Partial Fraction on 19.04.19
187. Find roots of non-linear equations using Modified Newton Raphson method (Multivariate Newton Raphson method) on 19.04.19
188. Solve linear equations using Elimination method on 19.04.19
189. Maximize Profit case in Transportation problem on 07.04.19
190. Revised Simplex method on 26.03.19
191. Moore-Penrose Pseudoinverse on 22.03.19
192. Geometric mean, Harmonic mean for ungrouped data on 21.03.19
193. Geometric mean, Harmonic mean for grouped data on 21.03.19
194. LQ Decomposition on 20.03.19
195. Muller's method on 20.03.19
196. Matrix Algebra on 17.03.19
1. Matrix Algebra with variables
`[[2x,3y],[3x,4z]]`
2. Matrix Algebra with complex numbers
`[[-5i,3i],[4i,5i]]`
3. Matrix Algebra with surds
`[[1/sqrt(2),sqrt(2)],[4,-5]]`
197. PERT and CPM on 10.03.19
1. Network diagram
1. Activity, Predecessors
2. Activity i-j
3. Activity i-j, Name of Activity
2. Critical path, Total float, Free float, Independent float
1. Activity, Predecessors, Duration
2. Activity i-j, Duration
3. Activity i-j, Name of Activity, Duration
3. Project scheduling with uncertain activity times (Optimistic, Most likely, Pessimistic)
1. Activity, Predecessors, to, tm, tp
2. Activity i-j, to, tm, tp
3. Activity i-j, Name of Activity, to, tm, tp
4. Project crashing to solve Time-Cost Trade-Off with fixed Indirect cost
1. Activity, Predecessors, Normal Time & Cost, Crash Time & Cost and Indirect Cost
2. Activity i-j, Normal Time & Cost, Crash Time & Cost and Indirect Cost
3. Activity i-j, Name of Activity, Normal Time & Cost, Crash Time & Cost and Indirect Cost
5. Project crashing to solve Time-Cost Trade-Off with varying Indirect cost
1. Activity, Predecessors, Normal Time & Cost, Crash Time & Cost and varying Indirect Cost
2. Activity i-j, Normal Time & Cost, Crash Time & Cost and varying Indirect Cost
3. Activity i-j, Name of Activity, Normal Time & Cost, Crash Time & Cost and varying Indirect Cost
198. Transportation Problem
1. Heuristic method-1 on 07.01.19
2. Heuristic method-2 on 07.01.19
3. Row minima method on 24.12.18
4. Column minima method on 24.12.18
5. Russell's approximation method on 24.12.18
199. class and their frequency table on 31.12.18
200. less than or more than type cumulative frequency table on 31.12.18
201. Ratio and Proportion on 02.12.18
202. Synthetic division on 12.11.18
203. Singular Value Decomposition (SVD) on 04.11.18
204. All problem solution using search box on 05.10.18
205. Share solution on facebook, twitter with your friends on 17.08.18
206. Matrix Structure on 24.07.18
207. Algorithm, Formulas, Examples added at respective pages on 20.07.18
208. Simplex method Algorithm and examples on 08.07.18
209. Statistics on 30.03.18
1. Permutation & combination
1. Find `n!`
2. Find `(n!)/(m!)`
3. Find `{::}^nP_r`
4. Find `{::}^nC_r`
5. How many words can be formed from the letters of the word daughter?
6. How many ways a committee of players can be formed ?
7. Permutation, Combination List
2. Probability
1. Coin
2. Dice
3. Cards
4. Balls
210. Calculus
1. Trigonometry on 20.03.18
1. Simplifying trigonometric expressions,
eg. (1) `sin(30)*cos(60)+sin(30)*cos(60)`, (2) `tan(x)+cot(x)`, (3) `tan^2(x)-sin^2(x)`, (4) `csc(x)/cos(x)-cos(x)/sin(x)`
1.2 Proving trigonometric identities,
eg. (1) `sin(30)*cos(45)*tan(60)=sin(45)*cos(60)*cot(30)`, (2) `sin^2(50)+sin^2(40)=1`
2.1 If `sin(x)=5/13` then Find the values of other five trigonometric functions
2.2 If `sin(x)=3/5` then solve expression `cos(x)csc(x)+tan(x)sec(x)`
2. Derivative on 20.03.18
1. Find Derivative,
eg. (1) `d/(dx)(2x^(3)-2x^(2)-5x+4)`, (2) `d/(dx)(log(x)e^(x))`, (3) `d/(dx)(3cos(sin(x)))`
2. Second Derivative
3. Third Derivative
4. Fourth Derivative
5. nth Derivative / Higher order Derivative
6. Derivative at a Point
211. About us
212. Algebra
1. Functions
2. Set Theory (using builder form)
3. Interval notation and set builder notation
213. Word Problems
1. Age word problems
2. Unitary Method (Chain Rule)
214. Simplex method
1. Branch and Bound method
2. 0-1 Integer programming problem
215. Game Theory
1. Bimatrix method
216. Matrix operations
1. Cholesky Decomposition
2. QR Decomposition (Gram Schmidt Method)
3. QR Decomposition (Householder Method)
217. Solve numerical differential equation using
1. Adams bashforth predictor method
2. Milne's simpson predictor corrector method
218. Coordinate Geometry
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