## Multiplication of two numbers that differ by 4

### If two numbers differ by 4, then their product is the square of the number in the middle (the average of the two numbers) minus 4.

Let me explain this rule by taking examples

22*26 = 24^2 - 4 = 572

98*102 = 100^2 - 4 = 9996-
## Example.

Understand the rule by 1 more example

148*152 = 150^2 - 4 = 22496 -
**Post / Read comment (2)**