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Home > Pre-Algebra calculators > Which of the following is a prime number 13,48,49,23,45,47 example
2. Which of the following is a prime number 13,48,49,23,45,47 example ( Enter your problem )
( Enter your problem )
  1. Example-1
 		Other related methods
  1. Is 31 a prime number
  2. Which of the following is a prime number 13,48,49,23,45,47
  3. Which of the following is a composite number 13,19,22,31
  4. First 1000 prime numbers
  5. 5th prime number
  6. Prime numbers from 1 to 1000
  7. Greatest prime number between 1 and 100
  8. What is the next 2 prime number after 37
  9. What is the previous 2 prime number before 37
  10. What is the largest 2 digit prime number
  11. What is the smallest 4 digit prime number
  12. Express 21 as the sum of three prime numbers
  13. are 25 and 27 co-prime numbers
  14. Find all co-prime numbers from 1 to 100
  15. are 11 and 13 twin primes
  16. Find all twin prime numbers between 1 to 100
1. Is 31 a prime number
(Previous method)		3. Which of the following is a composite number 13,19,22,31
(Next method)

1. Example-1


1. which of the following is a prime number 13,48,49,23,45,47

Solution:
NumberFactorsPrime or Composite?
131,13Prime
481,2,3,4,6,8,12,16,24,48Composite
491,7,49Composite
231,23Prime
451,3,5,9,15,45Composite
471,47Prime

Prime numbers : 13,23,47
2. which of the following is a prime number 25 13 32

Solution:
NumberFactorsPrime or Composite?
251,5,25Composite
131,13Prime
321,2,4,8,16,32Composite

Prime numbers : 13
3. which of the following is a prime number 33 81 93 97

Solution:
NumberFactorsPrime or Composite?
331,3,11,33Composite
811,3,9,27,81Composite
931,3,31,93Composite
971,97Prime

Prime numbers : 97
4. which of the following is a prime number 31 61 91 51

Solution:
NumberFactorsPrime or Composite?
311,31Prime
611,61Prime
911,7,13,91Composite
511,3,17,51Composite

Prime numbers : 31,61

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1. Is 31 a prime number
(Previous method)		3. Which of the following is a composite number 13,19,22,31
(Next method)


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