Monthly Archive: September 2011

squares of numbers

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          ...

Perfect Numbers

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...

Idioms 1

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....

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