# Square and Cube Roots Using Factor trees

## Interactive practice questions

Use a factor tree to help find the $\sqrt{196}$196.

a

Write $196$196 as a product of prime factors in index notation.

b

Hence find the $\sqrt{196}$196.

Easy
Approx 3 minutes

Consider $\sqrt{225}$225.

Use a factor tree to help find $\sqrt{30625}$30625.

Use a factor tree to help find $\sqrt{3969}$3969.

### Outcomes

#### NA5-2

Use prime numbers, common factors and multiples, and powers (including square roots)