Question

7. Which of the following numbers are prime?
139,199, 162, 397, 613,772, 769,990, 853
8. Classify the following numbers as prime or composite:
(a) 58
(b) 772 (C) 184
(d) 853 (e) 93
9. Which of the following pairs are co-prime?
(a) 96 and 55 (b) 71 and 89
(c) 321 and 492 (d) 169 and 65
10. Determine if 5,74,380 is divisible by 45.
11. Find the two numbers such that their difference is 1 and the product is 72.
12. A number is divisible by 24. By which other numbers will this number be completely divisible?
13. The numbers 90 and 84 are divisible by 6. Check the divisibility of the sum and the difference of these two numbers by 6.
​

Answer 1

1,2,3,4,6,8,12 are the numbers by which the number could be perfectly divided