semi prime vs prime
semi- prime is defined to be the product of two prime , what is the ratio of the number of semi prime to prime for natural number smaller or equal to 22 ,expression could written as ,which p and q are coprime ,submit your answer as p+q
The answer is 2.
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1 solution
prime : [ 2,3,5,7,11,13,17,19] semi-prime : [4,6,9,10,14,15,21,22]