Prime Numbers from 1-1000

Find out the wrong number in the series:

Find out the wrong number in a given series.

Cube Trick

Multiply any number by 6…

Multipication

Average _ Difference should be same

Number of Triangle

Time & Work

Geomatric formula

Reverse Counting Rule

Reverse Counting Rule

Counting 1 Addition Rule

99^2, 999^2, 9999^2.....

Superfast Techniques for Summation of Numbers

Squaring Numbers Using Base 50 Method

Square Using Base 100 Method

Shortcut Trick for finding the sum of the first n natural numbers quickly. 

Shortcut for Squaring Decimal Numbers

Square of any number (Universal Method)

Shortcut method of square any number ending in 5.