All those not less than 20.
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The odd prime numbers less than 20 are 3, 5, 7, 11, 13, 17, and 19.
The first 20 odd numbers are: 13579111315171921232527293133353739.
Seven of them.
25
There are 5 odd numbers between 10 and 20: 11, 13, 15, 17, 19