Question

If there is a digit in the unit place of a number, when the number will not be a square?

Answer 1

Step-by-step explanation:

– If unit digit of a number is 2 then it can't be a perfect square. – If unit digit of a number is 3 then it can't be a perfect square. – If unit digit of a perfect square is 4 then ten's digit has to be Even. E.g. 64, 144, 484 all are Perfect Square having unit digit 4 and tens digit is even.

Answer 2

1. If unit digit of a number is 2 then it can't be a perfect square.
2. If unit digit of a number is 3 then it can't be a perfect square.
3. If unit digit of a perfect square is 4 then ten's digit has to be Even.

E.g. 64, 144, 484 all are Perfect Square having unit digit 4 and tens digit is even.