What is the total number of prime numbers less than 55?  Answers
A) 17 B) 18 C) 16 D) 20 E) 21
Solution   Prime numbers less than 55 are	=16.   2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53   Their number is 16.   Answer 16
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What is the total number of prime numbers less than 55?