What is the total number of prime numbers less than 70?
Choose the most appropriate option:
A) 17  B) 18  C) 19  D) 20  E) 21
Solution   Prime numbers less than 70 are	=12.   2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,and 67   Their number is 19.   Answer 19
<result>C</result>
What is the total number of prime numbers less than 70?