Question

2. Find the common factors of: (a) 20 and 28
(b) 15 and 25 ​

Answer 1

Answer:

The common factors of 20, and 28 are 1, 2, and 4.

The common factors of 15 and 25 are 1 and 5.

Step-by-step explanation:

• Give: 20 and 28

Factors of 20 are 1, 2, 4, 5, 10, 20

Factors of 28 are 1, 2, 4, 7, 28

Therefore, the common factors of 20, and 28 are 1, 2, and 4.

• Given:15 and 25

Factors of 15 are 1, 3, 5, 15

Factors of 25 are 1, 5, 25

Therefore, the common factors of 15 and 25 are 1 and 5.

Answer 2

Here we have to find the common factors of the given numbers

a) 20 and 28

We will first write down the factors of 20 and 28

Factors of 20 = 1, 2, 4, 5, 10, 20

Factors of 28 = 1, 2, 4, 7, 14, 28

So, the common factors of 20 and 28 are 1, 2, and 4.

b) 15 and 25

We will first list the factors of 15 and 25

Factors of 15 = 1, 3, 5, 15

Factors of 25 = 1, 5, 25

So, the common factors of 15 and 25 are 1 and 5