Question

The digit at the ones place of ${57}^2$ is _________.

Answer 1

Determine the digit at the ones place.

The digit at the ones place of the square of $57$ will be equal to the digit at the ones place of the square of $7$.

The square of the number $7$ is $49$, i.e. digit at ones place is $9$, which would be the same as that of the square of $57$.

So, the digit at the ones place is $\underline{9}$.