The product of the prime numbers 3 and 5 is 15.
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-8 and -15
There are 15 prime numbers up to 50.
22
The prime numbers between 15 and 30 are: 17 19 23 29.
Numbers are either prime or they aren't. In this case, 45 is divisible by 3 and 15; sixty-four goes into 2, 4, 8 and 32. The term "relatively prime" compares two numbers and their common factors. If the GCF of the two numbers is 1, then they are "relatively prime."