Question

Find the squares of the following using the method of squaring 2- digit numbers having unit digit as 5
a) 45

Answer 1

You can find square of these numbers by three easy steps.
Step 1: Multiply ten’s digit with its next number.
Step 2: Find square of unit’s digit. i.e.: Square of 5.
Step 3: Write answers of step 1 and step 2 to together or side by side.
TAKE 25
$2\times 3=65^2=25$
Answer = 625