Question

Just observe the unit digits and state which of the following are not perfect squares.
(i) $3136$ (ii) $3722$ (iii) $9348$ (iv) $2304$ (v) $8343$

Answer 1

We know that all perfect squares and with (unit digit is ) $0,1,4,5,6,9$.

And the give numbers are : $3136,3722,9348,2304,8343$.

So, $3722,9348,8343$ are not perfect squares as their unit digits are $2,8$ and $3$ respectively.