If one positive integer is greater than another positive integer by 3, and the difference of their cubes is 63, what is their sum? Choose the correct choice from the following options
A) 5	B) 4	C) 3	D) 2	E) 1
1^3 = 1   2^3 = 8   3^3 = 27   4^3 = 64   The two numbers are 1 and 4.   The answer is 5.
<result>A</result>
If one positive integer is greater than another positive integer by 3, and the difference of their cubes is 63, what is their sum?