How many numbers from 10 to 31 are exactly divisible by 3?
Choose the correct choice from the following answers:
A) 13 B) 15 C) 16 D) 7 E) 18
12, 15, 18, 21, 24, 27, 30.   7 Numbers.   10/3 = 3 and 31/3 = 10 ==&gt; 10 - 3= 
<gadget id="calculator">10 - 3</gadget>
<output>7</output>
7. Therefore 7 digits   7)
<result>D</result>
How many numbers from 10 to 31 are exactly divisible by 3?