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Anonymous
The odd prime numbers less than 20 are 3, 5, 7, 11, 13, 17, and 19.
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It is 75.
Seven of them.
4,6,8,9,10,12,14,15,16,18 :)
7 different numbers.35711131719
2 x 2 x 5 = 20 20 is even.