Question

How many prime numbers are there between 21 and 35?

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

thanks @KendrickLamar2014

Answer 5

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)

Answer 6

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

Answer 7

No Problem