# Monthly Archive: September 2011

## Squares of numbers from 1 to 30

For making your calculation faster you must remember the squares of  numbers from 1 to 30. Here is a collection of squares which could be easily remembered. Sq. 1 = 1          ...

## Speed up your calculation 1

All MBA exams require fast calculation. Even 5-10 seconds saved per question will save you enough time to solve 3-4 more problems ultimately resulting in a better score. So following things can be handy...

## Perfect Numbers

A perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself. Or we can say...

## Last digit of a product of numbers with power.

Last digit of a product of any number of numbers is equal to last digit of product of last digits of all the numbers. So to find the last digit in this case first...

## Last digit of a sum of numbers with power.

Last digit of a sum of any number of numbers is equal to last digit of sum of last digits of all the numbers. So to find the last digit in this case first...

## Last digit of any power of a number

To find the last digit of any power of a number we should keep following in mind. 1. Last digit of any power number repeats after a certain interval say N. So N is...

## Idioms 1

1. Throw down the gauntlet Meaning : To issue a  challenge . A gauntlet-wearing knight would challenge a fellow knight or enemy to a duel by throwing one of his gauntlets on the ground....