Q. 255.0( 1 Vote )

Sum of the number of primes between 16 to 80 and 90 to 100 is
A. 20

B. 18

C. 17

D. 16

Answer :

Prime numbers are those numbers, which don't have factors other than 0 and itself.


Prime numbers are 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61 67, 73, 79 between 16-80


The count of above list is 15


Prime numbers between 90 to 100 are 97


The count is 1


Sum of counts = 15+1 = 16

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