SOLUTION: How many whole numbers between 1 to 200 are divisible by 6 and not by 10 ?

Question 200927: How many whole numbers between 1 to 200 are divisible by 6 and not by 10 ?
Found 2 solutions by rfer, jim_thompson5910:
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
13
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Just list all the multiples of 6 and take off any numbers that are multiples of 10. So here are all the numbers from 1 to 200 that are are divisible by 6 and not by 10:

6, 12, 18, 24, 36, 42, 48, 54, 66, 72, 78, 84, 96, 102, 108, 114, 126, 132, 138, 144, 156, 162, 168, 174, 186, 192, 198

There are 27 numbers here.

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