Math Shortcuts

Question 1

What is the shortcut to finding the square of a number? (Only for 2 digits)

Answer 1

1. First multiply the 2 digits of the number with 2.
   ex: (24)^2 = 2 * 4 * 2 = 16
2. take the squares of the digits separately
   ex: 02 04
3. now add a zero to the right of 16 and add
   ex: 0364 is the ans