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# How do know that 7 must be a factor each multiple of 7?

Updated: 9/19/2023

Wiki User

13y ago

Best Answer

because if it is a multiple of 7 that means that 7 can go in to it evenly

ex: 7 factors:1,7

14:1,2,7,14

21:1,3,7,21

Wiki User

13y ago
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Q: How do know that 7 must be a factor each multiple of 7?
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Because it's the seven times table

It must be 10.

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The greatest common factor of two (or more) integers is the biggest whole number that divides into each one of them. The least common factor is the smallest whole number that divides into each one of them and must be 1. Very possibly, you meant the least common multiple, however?

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### How do you find whether a number is a perfect square by using its prime factors?

In the prime factorisation of the number, each factor must appear an even number of times.In the prime factorisation of the number, each factor must appear an even number of times.In the prime factorisation of the number, each factor must appear an even number of times.In the prime factorisation of the number, each factor must appear an even number of times.

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### What two digit number is a factor of 30 and a multiple of 4?

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