Question

State whether true or false:
If the square of a number ends with $5$, then its cube ends with $25$.

• A. True
• B. False

Answer 1

The correct option is B False

We know, $5$ ends with $5$ and $5^3=125$ ends with $25$,

also, $15$ ends with $5$ and ${15}^3=3375$ does not ends with $25$

and $25$ ends with $5$ and ${25}^3=15625$ ends with $25$.

Therefore, clearly, if a square of a number ends with $5$, then its cube may or may not end with $25$.

That is, the given statement is false and option $B$ is correct.