Question

(1) Which two numbers have 7 a common factor
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Answer 1

To find:

A pair of numbers have 7 as a common factor

Step-by-step explanation:

• We have to find a pair of numbers having a common factor 7.

• This means that both the numbers of the pair must be divisible by 7.

• Let's see the numbers divisible by 7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, ... ... .

• From above numbers, we can take any two numbers and we will see that they have a common factor 7.

Answer:

Our required pairs are (7, 14), (7, 21), (7, 28), (14, 21), (14, 28), (21, 28), ... ... .