Division and Multiplication
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
Math Trick for Squaring Numbers Ending in 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