Question

1. Write all the factors of each of the following:
(i) 125 (m) 729 (in) 512 (iv) 75 (v) 60
2. Write first five multiples of each of the follwing numbers:
(1) 25 () 35 (m) 45 (iv) 40
3. Find the common factors of
15 and 25 (n) 35 and 50 (on) 20 and 28
4. Find the common factors of
05.15 and 25 (m) 2.6 and 8
5. Find first three common multiples of 6 and 8
6. Find first two common multiples of 12 and 18
7. Express cach of the following numbers as the sum of two odd primes
(1) 36 (11) 42 (m) 84
8. Express each of the following numbers as the sum of three odd primes:
6) 31 (1) 35 (18) 49
9. Write the smallest 5-digit number and express it as a product of primes.
10. Determine the prime factorization of each of the following numbers
(1) 216 (1) 420 (in) 468 (iv) 945 (v) 7325
11. Find the smallest number having three different prime factors.
12. Find the smallest number having four different prime factors.
13. Test the divisibility of the following number by 2:0) 6520 (i) 1245 (1) 1268
14. Test the divisibility of the following number by 3:
(1) 70335 (1) 607439 (m) 9082976
15. Test the divisibility of the following number by 6: (1) 7020 (m) 56423 (m) 732510
16. Test the divisibility of the following number by 4:
(1) 786532 (1) 1020530 (11) 9801526
17. Test the divisibility of the following number by 8: (1) 8364 (i) 7314 (1) 36712
18. Test the divisibility of the following number by 9.
(1) 187245 (i) 3478 (m) 547218
19. Test the divisibility of the following number by 11:
(1) 5335 (i) 70169803 (1) 10000001​

Answer 1

Answer:

I) answer is 5

2) is 3 or 9

3) is 2

4) is 5

5) is 2

Answer 2

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