Archive for problems on numerics in aptitude

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APTITUDE-Problems on Numbers

Introduction:
Natural Numbers:
All positive integers are natural numbers.
Ex 1,2,3,4,8,……
There are infinite natural numbers and number 1 is the least natural number.Based on divisibility there would be two types of natural numbers. They are Prime and composite.
Prime Numbers:

A natural number larger than unity is a prime number if it does not have other divisors except for [...]