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Search the internet for a list of prime numbers - the Wikipedia article on prime numbers might list a few. All numbers between 2-100 that are not prime, are composite. (The number is not counted as prime, nor as composite.)

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Q: How many composite numbers are less than 100?

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74

Five.

There are 18.

There are 15 prime numbers and 34 composite numbers because 1 is not considered to be a prime or composite number

there are 4. 11,13,17,19

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There are 15 composite numbers greater than 50 but less than 70

There are 18 that are less than 30.

1260 of them.

74

3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.

The sum of the composite numbers that are less than 8 is: 4+6 = 10

composite numbers are less than 12: 4, 6, 8, 9, 10

24

There are 18.

Five.

There are 15 prime numbers and 34 composite numbers because 1 is not considered to be a prime or composite number

49 of them.

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