Basic

A **factor** is a number that will divide into another number without leaving a remainder.

To find all the factors of a number, work out which other numbers will divide into that number.

1. What are the factors of 32?

Answer: 1, 2, 4, 8, 16 and 32

The pairs are 1 x 32, 2 x 16 and 4 x 8.

2. What factors do 32 and 20 have in common?

Answer: 1, 2 and 4

For 32: 1, 2, 4, 8, 16, 32. For 20: 1, 2, 4, 5 and 20. The numbers that are in both lists are 1, 2 and 4.

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