Explain why 3×5×7+5 is a composite number
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because 5 has more than 1 factor so it is called composite no.
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Hey.....here is your answer...☺☺☺
3 × 5 × 7 + 5
= 5 ( 3 × 7 + 1)
= 5 × 21
= 105.
Since last number is 5 and the divisibility rule of 5 is if the last number is 0 and 5 then the number is divisible by 5.
Therefore, it is a composite number.
Hope it's helpful to u....☺☺☺
3 × 5 × 7 + 5
= 5 ( 3 × 7 + 1)
= 5 × 21
= 105.
Since last number is 5 and the divisibility rule of 5 is if the last number is 0 and 5 then the number is divisible by 5.
Therefore, it is a composite number.
Hope it's helpful to u....☺☺☺
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