1.

Find the common factors of the following group of numbers. a) 12 and 15 b) 21 and 24​

Answer»

ANSWER :-

  • 12 and 15 ➞ 3.
  • 21 and 24 ➞ 3.

Explanation :-

Given Numbers :

  • 12 and 15.
  • 21 and 24.

To FIND :

We have to find the common factors of these numbers.

Solution :

(A) 12 and 15.

12 = 2 × 3 × 2.

15 = 3 × 5.

Here, we can see that,

3 is common in both of the numbers.

So, Common Factor = 3.

(B) 21 and 24.

21 = 3 × 7.

24 = 3 × 2 × 2 × 2.

Here, we can see that,

3 is again common in both of them.

So, Common Factor = 3.

Therefore,

● Common Factor in 12 and 15 = 3.

● Common Factor in 21 and 24 = 3.


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