Question

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3. Explain why 7 x 11 x 13 + 13 is a composite number.
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Answer 1

Answer:

7×11×13+13 may be written as, i.e. 13 * (78). So other than 1 and the number itself, 13 and 78 are also the factors of the number. ... So, other than the number and 1, it have 5 and 1009 as it's factors too. So it is also a composite number.

Step-by-step explanation: