Answer :

NO
Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300

No. If you multiply 15 by 10 to get 150, then you end up 10 higher than 140. You subtract 15 again, you get 135, and you jumped right past 140,
so no it's not.

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