Explain why 5& 7& 9+ 7 is cr ? Composite number
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Solution :
5*9*7 + 7
= 7( 5*9 + 1 )
= 7( 45 + 1 )
= 7 × 46
= 7 × 2 × 23 ( more than two factors )
Therefore ,
5*7*9 + 7 is a composite Number.
••••
5*9*7 + 7
= 7( 5*9 + 1 )
= 7( 45 + 1 )
= 7 × 46
= 7 × 2 × 23 ( more than two factors )
Therefore ,
5*7*9 + 7 is a composite Number.
••••
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