Question

Find whether the square of the given number is even or odd: 431

Answer 1

$\text{Square of odd number is always odd}$
$\text{Square of even number is always even}$
Given a number 431 and need to find out whether it is even or odd
Now, the square of number, n = n²
Consider units digit of a number 431 and square the units digit number.
⇒ Here, Units digit number is 1
⇒ Square of 1 = 1
⇒ Square the unit digit 1 = 1
⇒ 1 is a odd number
∴ square of 431 will be again odd number
Hence, 431 is odd number.