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There are 4 prime numbers under ten.

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Q: How many number under 10 have 2 factors?
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When are two number factors of product number?

Two numbers are factors of a product when they multiply with each other to become the product. For example, if the product number is 10, then our factors can be 2 and 5, or 1 and 10.

What 2 digit number with 10 factors?

48 has ten factors.

Does any number that has 10 also have 5 as a factor?

Correct. 5 and 2 are factors of 10, and will be factors of any number having 10 as a factor.

How you get the prime factors of the number?

Well say the number was 10 you find the factors (1,2,5,10) then out of those numbers you pick the prime number/s 2 and 10. For 20 , the factors are 1,2,4,5,10 and 20 so the prime factors are 2, and 5 again

What number bewtween 0 and 20 have four factors?

It is 10 whose factors are: 1, 2, 5 and 10