Question

The square of which of the following would be odd number ?

• A. $512$
• B. $320$
  
• C. $431$
• D. $220$

Answer 1

The correct option is C $431$

The last digit of the square of $431$ is $1(1\times 1=1),$ which forms an odd number

Also as we know that the square of any even digit will also be the even and square of any odd digit will also be the odd number

Hence, C will be correct answer.