Lesson: Finding Factors of Whole Numbers

Scarlett is learning how to find factor pairs for numbers. These are pairs of factors with a given product.

She makes arrays from 15 blocks to find the factors of 15.

She sees that 1 and 15 are a factor pair, because their product is 15. What is another factor pair for 15?

Matthew is finding factor pairs of 42. Which number is missing from the table?

Factors of 42
1	42
2	21
3
6	7