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Q: My age is between 20 and 50. It's an even number. It has exactly 9 factors. How old am I?

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2

8 (1,2,4,8)

Every one of them has an even number of factors.

All of them.

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Prime numbers have exactly tw0 factors, 1 and the number itself. Since 1204 is an even number, 2 is one of its factors so it has to be a composite number.

All of them.

Sum of even factors of a number will always equal an even number.

It is 522.

128 is composite because you can divide it by 1,2,4,32,64,128128 is a composite number because it is an even number and therefore has 2 as one of its factors. A prime number has exactly 2 factors, 1 and itself.

Every number except the number 1 has at least two factors, 1 and the number itself. Prime numbers have exactly two factors and composite numbers have more than two factors. All even numbers except the number 2 are composite numbers and have more than two factors. The number 2 is prime and its only factors are 1 and 2.

Just the number 2.

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