Question

Match the following numbers with their respective factors:

• A. 1, 2, 4, 5, 10, 20
• B. 1, 2, 3, 6, 9, 18
• C. 1, 13
• D. 1, 2, 4, 7, 14, 28

Answer 1

The factors of 20 can be shown as:

∴ Factors of 20 are 1, 2, 4, 5, 10 and 20.

The factors of 18 can be shown as:

∴ Factors of 18 are 1, 2, 3, 6, 9 and 18.

We know that 13 is a prime number.
So, it has only two factors: 1 and 13.

∴ Factors of 13 are 1 and 13.

The factors of 28 can be shown as:

∴ Factors of 28 are 1, 2, 4, 7, 14 and 28.