21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39
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17. They are:
20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40
There are eleven of them including 20
20,21,22,24,25,26,27,28,30
The composite numbers between 10 and 20 are 12, 14, 15, 16 and 18.
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.
12,14,15,16, and 18