Question

Explain why 7*6*5*4*3*2*1+7 is a composite number.

Answer 1

Hey friend..!! here's your answer
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7 × 6 × 5 × 4 × 3 × 2 × 1 + 7

7 (6 × 5 × 4 × 3 × 2 × 1 + 1)

7 (720 + 1)
7 × 721
7 × 721 = 7 × 7 × 103

The given expression has 7 and 103 as it factors other than 1 and number itself.

So it is an composite number .

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#Hope its help

Answer 2

Hey!!
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➡Composite Numbers ⬅
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◾What is a Composite Number ?

↩A Number that has more than two factors is called a composite Number . 4 is the smallest composite Number.


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➡Why 7 × 6 × 5 × 4 × 3 × 2 × 1 + 7 is a composite Number ?

Taking 7 common from the Number :


= 7 ( 6 × 5 × 4 × 3 × 2 × 1 + 1 )

= 7 ( 720 + 1 )

= 7 ( 721 )


✔✔The Number has two factors excluding 1 and the number itself . Hence it is a composite number.

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