Question

4. Explains why 7x11x13+13 and 7 x 6 x 5x 4 x 3
X 2 x 1 +5 are composite numbers.​

Answer 1

Step-by-step explanation:

7 x 11 x 13 +13

= 13 ( 7 x 11 x 1 + 1 )

= 13 x 78

Since, 78 is a composite number, Multiple of 78 is also composite number.

7 x 6 x 5 x 4 x 3 x 2 x 1 + 5

= 5 ( 7 x 6 x 1 x 4 x 3 x 2 x 1 + 1 )

= 5 x 1008

Since, 1008 is a composite number, Multiple of 1008 is also composite number.

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