How many numbers from 10 to 50 are exactly divisible by 3?  Pick one.
A) 13
B) 15
C) 16
D) 17
E) 18
12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45,48.   13 Numbers.   10/3 = 3 and 50/3 = 16 ==&gt; 16 - 3= 
<gadget id="calculator">16 - 3</gadget>
<output>13</output>
13. Therefore 13 digits   13)
<result>A</result>
How many numbers from 10 to 50 are exactly divisible by 3?