Question

show that the number 11×13×15×17+17 is a composite number.

Answer 1

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Answer 2

11×13×15×17+17
Taking 17 as common
17 (11×13×15×1)=0
Divide it by 7
11×13×15=0
It means that the above number has 17 as a factor Therefore it is a composite number.
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