2 x 3 x 5 = 30
2 x 3 x 7 = 42
2 x 3 x 11 = 66
2 x 5 x 7 = 70
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There are 35 prime numbers less than 150.
There are 15 prime numbers less than 50
There are 27 prime numbers less than 102.
They are 210, 330, 390 and 462.
There are 25 prime numbers less than 100