1. Example-1
1. which of the following is a prime number 13,48,49,23,45,47
Solution:
| Number | Factors | Prime or Composite? | | 13 | 1,13 | Prime | | 48 | 1,2,3,4,6,8,12,16,24,48 | Composite | | 49 | 1,7,49 | Composite | | 23 | 1,23 | Prime | | 45 | 1,3,5,9,15,45 | Composite | | 47 | 1,47 | Prime |
Prime numbers : 13,23,47
2. which of the following is a prime number 25 13 32
Solution:
| Number | Factors | Prime or Composite? | | 25 | 1,5,25 | Composite | | 13 | 1,13 | Prime | | 32 | 1,2,4,8,16,32 | Composite |
Prime numbers : 13
3. which of the following is a prime number 33 81 93 97
Solution:
| Number | Factors | Prime or Composite? | | 33 | 1,3,11,33 | Composite | | 81 | 1,3,9,27,81 | Composite | | 93 | 1,3,31,93 | Composite | | 97 | 1,97 | Prime |
Prime numbers : 97
4. which of the following is a prime number 31 61 91 51
Solution:
| Number | Factors | Prime or Composite? | | 31 | 1,31 | Prime | | 61 | 1,61 | Prime | | 91 | 1,7,13,91 | Composite | | 51 | 1,3,17,51 | Composite |
Prime numbers : 31,61
This material is intended as a summary. Use your textbook for detail explanation.
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