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...
Author: administration
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....
How to deal with tricky quadratic and cubic equation
So today lets discuss how to solve the problems related to quadratic and cubic equations. Though these problems are simple but a bit tricky. Similar approach is required in each and every problem. First...
A small Divisibility Trick for any number
Sometimes it becomes very cumbersome to check the divisibility by the conventional methods specially in case of 7, 11, 13…. etc. Since the divisibility methods corresponding to these numbers takes good amount of time,...
Is √x² = x or -x or none.
Crawl through various forums of mathematics & MBA preparation and you will find people searching for a clue whether √x² = x or -x or what …. Now to solve this situation, always remember in...
