If one positive integer is greater than another positive integer by 4, and the difference of their cubes is 316, what is their sum?  Answers:
A) 6  B) 8  C) 10  D) 12  E) 14
1^3 = 1   2^3 = 8   3^3 = 27   4^3 = 64   5^3 = 125   6^3 = 216   7^3 = 343   The two numbers are 3 and 7.   The answer is 10.
<result>C</result>
If one positive integer is greater than another positive integer by 4, and the difference of their cubes is 316, what is their sum?