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Answer :

Factors of 12 = 1, 2, 3, 4, 6, 12

Hence the number which is divisible by 12, will also be divisible by its factors i.e., 1, 2, 3, 4, 6 and 12.

- Q.1 Find the common factors of: (a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120
- Q.2 Find the common factors of: (a) 4, 8 and 12 (b) 5, 15 and 25
- Q.3 Find first three common multiples of: (a) 6 and 8 (b) 12 and 18
- Q.4 Write all the numbers less than 100 which are common multiples of 3 and 4.
- 5. Which of the following numbers are co-prime? (a) 18 and 35 (b) 15 and 37 (c) 30 and 415 (d) 17 and 68 (e) 216 and 215 (f) 81 and 16
- Q.6. A number is divisible by both 5 and 12. By which other number will that number be always divisible?

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