Which of the following are squares of even numbers?

(i) 196 (ii) 441 (iii) 900 (v) 324

(iv) 625

(i) We know that,

The square of an even number is always even

The given number is ending with the digit 6 which is an even number

Thus, it must be a square of even number

(ii) We know that,

The square of an even number is always even

The given number is ending with the digit 1 which is an odd number

Thus, it is not square of even number

(iii) We know that,

The square of an even number is always even

The given number is ending with the digit 0 which is an even number

Thus, it must be a square of even number

(iv) We know that,

The square of an even number is always even

The given number is ending with the digit 5 which is an odd number

Thus, it is not a square of even number

(v) We know that,

The square of an even number is always even

The given number is ending with the digit 4 which is an even number

Thus, it must be a square of even number