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

We know that perfect squares end with the digits 0, 1, 4, 6, 9. Anything other than these in the unit’s place does not qualify to be a perfect square.

Therefore (ii) 3722 is not a perfect square

(iii) 9348 is not a perfect square

(v) 8343 is not a perfect square