How many prime numbers are there between 21 and 35?

Question

mathteacher1729 · Answer

http://www.prime-numbers.net/prime-numbers-1-100-chart.html

kendricklamar2014 · Answer

Between 21-35 there are 3:
23, 29, and 31

kendricklamar2014 · Answer

Here is a list of Primer Numbers: https://www.mathsisfun.com/prime_numbers.html

anonymous · Answer

thanks @KendrickLamar2014

solomonzelman · Answer

between 21 and 35.

at first all the even numbers will NOT be primes automatically, so you are only considering the odd numbers.

out of all remaining odd numbers, the non-primes are:
21 (divisible by 3 & 7),
25 (divisible by 5),
27 (divisible by 3 & 9),
33 (divisible by 3 & 11),
35 (divisible by 5 & 7)

solomonzelman · Answer

so how many numbers that are
1)  not even
2)  not divisible by anything
3)  on the range of 21-35
are remaining?

kendricklamar2014 · Answer

No Problem