SOLUTION: Between 1 and 100, how many are divisible by both 3 and 5?

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Question 832158: Between 1 and 100, how many are divisible by both 3 and 5?
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
What is the lowest common number for each?
3 - {3,6,9,12,15,18,21...}
5 - {5,10,15,20,25,30...}
.
15 is the lowest in common, so any number divisible by 15 is divisible by both 3 and 5.
In the set 1-100, it would be {15, 30, 45, 60, 75, 90}