Solved Problems for Indian Statistical Institute (B. Math and B. Stat), Chennai Mathematical Institute, JEE Main & Advance ( IIT ) and for Olympiads ( RMO and INMO ). Get Solved problems for boards ( CBSE and ISC Mathematics Papers) along with board papers.
To show a given expression not a prime we have to simply factor it into at least two factors with each factor greater than 1. Here is a #problem from #NumberTheory which uses this technique of proving not a #prime. #PrimeMaths
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