**Division and Multiplication
**Divide with 5, 25, and 125

Multiply with 5, 25, and 125

Divide by 13

Multiply with 9, 99, and 999

Multiply two numbers close to 100

Multiply any two digit numbers

Multiply any large even number with 6

Multiply two numbers close to 10

Multiply large numbers by 11,12 or 13

Multiply numbers with even difference

Is a larger number divisible evenly by 2,3,4,5,6,8,9,10, or 11?

Remainder after Division of Large Number with 9

**Cube and Cube Roots**

Cube two or three digit number

Fast Cube Root Calculation in Mind!

**Square and Square Roots**

Square any three digit number in Mind

Square number Close to 50

Math Trick for Squaring Numbers Ending in 5

Square number ending with 0.2

Square number ending with 0.5

**Addition and ****Subtraction**

Addition of Number in Sequence in Mind

Adding even or odd numbers in series in Mind

Subtraction from 1000, 10000 or 1000000 in Mind

**Methods in Finance**

Rule of 72 – Time for investment to increase two times

Rule of 70 – Time for value of cash to decrease to half

Rule of 115 – Time for investment to increase three times

**Percentages and Fractions**

Fast Percentages