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

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

Hence find the $\sqrt{196}$√196.

Consider $\sqrt{225}$√225.

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

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

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