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Q: How many composite numbers are there below 20?

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The composite numbers that are between 1 and 20 inclusive are: 4 6 8 9 10 12 14 15 16 18 20 This is a total of eleven composite numbers equal to 20 and below.

The composite numbers that are between 1 and 20 inclusive are: 4 6 8 9 10 12 14 15 16 18 20 This is a total of eleven composite numbers equal to 20 and below.

The composite numbers up to 20 are 4,6,8,9,12,14,15,16,18 and 20.

There are 3 composite numbers between 20 and 25. They are 21, 22, and 24.

There are 7 composite numbers from 10 to 20 (including the boundaries):10, 12, 14, 15, 16, 18 and 20

There are eleven of them including 20

Not all numbers between 20 and 28 are composite numbers. 23 is a prime number.

10,12,14,15,16,18,20

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

20,21,22,24,25,26,27,28,30

11 composite 8 prime 1 neither

Three of them.

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