These multiplication tricks will only work for you if you have memorized or can quickly calculate the square of numbers. Learn the trick of finding square of any two digit number. Also master the shortcut to find the square of any number.

**Multiplication of Two Numbers that Differ by 2**

When two numbers differ by 2, their product is always the square of the number in between these numbers minus 1.

**Example**

1. 18*20 = 19^2 – 1 = 361 – 1 = 360

2. 25*27 = 26^2 – 1 = 676 – 1 = 675

3. 49*51 = 50^2 – 1 = 2500 – 1 = 2499

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