Find the Square of the Number that Ends with the Digit 5

• Let’s take the number 65 and try to find its square.
•  Start by writing the square of last digit ie 25 ( square of 5 is 25)
• Now, the first digit in 65 is 6. The number that follows 6 is 7.
• Multiply 6 and 7,we get 42 
• Write 42 first and later 25,So answer will be 4225