For which of the following values of n is (600+n)/n NOT an integer?  Choose one
A) 1 B) 2 C) 3 D) 4 E) 9
Solution:   This problem is easiest solved by plugging in each answer choice.   A) (600 + 1)/1 = 601/1= 
<gadget id="calculator">601/1</gadget>
<output>601</output>
601   Answer choice A yields an integer.   B) (600 + 2)/2= 602/2= 
<gadget id="calculator">602/2</gadget>
<output>301</output>
301   Answer choice B yields an integer.   C) (600 + 3)/3= 603/3= 
<gadget id="calculator">603/3</gadget>
<output>201</output>
201   Answer choice C yields an integer.   D) (600 + 4)/4= 604/4 = 126   Answer choice D yields an integer.   E) (600 + 9)/5 = 609/9 = 65, remainder 4   Answer choice E DOES NOT yield an integer.   Thus, the correct answer is answer choice 9.
<result>E</result>
For which of the following values of n is (600+n)/n NOT an integer?