why are these composite

Asked by SITHARA | 27th Mar, 2009, 07:53: PM

Expert Answer:

7×6×5×4×3×2×1+5=5045=5×1009, Clearly  being product of at least two factors apart from 1 and itself  it is composite.

13×11×7+11 =1012=2*2*253, clearly it is also composite.

 

 

Answered by  | 28th Mar, 2009, 02:37: PM

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