Question

What will be the units digit of the square of the given number $5125$?

• A. $0$
• B. $1$
• C. $5$
• D. $9$

Answer 1

The correct option is C $5$

Unit digit of multiplication of $2$ numbers is obtained by taking the last digit of the multiplication of two numbers in the unit place

Units digit of $5125\times 5125$ is obtained by taking the last digit of $5\times 5=25$

$\Rightarrow$ Unit digit of square of $5125$ is $5$.