Question

The square of which of the following numbers would be an old number?

(i) 731

(ii) 3456

(iii) 5559

(iv) 42008

Answer 1

• As we know that square of an even number is even number.
• Square of an odd number is odd number.

Hence, 

(i) 731

Since 731 is an odd number, the square of the given number is also odd.

(ii) 3456

Since 3456 is an even number, the square of the given number is also even.

(iii) 5559

Since 5559 is an odd number, the square of the given number is also odd.

(iv) 42008

Since 42008 is an even number, the square of the given number is also even.