How many multiples of 5 are there between 1 and 89 ?  Choose the correct choice from the following.
A) 15
B) 20
C) 13
D) 17
E) 22
5 multiples are 5,10,15,---------,80,85   It should be mentioned whether 1 and 89 are inclusive.   the answer is   (85-5)/5+1= 
<gadget id="calculator">  (85-5)/5+1</gadget>
<output>17</output>
17   Answer is 17
<result>D</result>
How many multiples of 5 are there between 1 and 89 ?