The ratio of two numbers is 2:3 and the sum of their cubes is 945. The difference of number is?
Choose one: A) 3 B) 4 C) 5 D) 6 E) 8

Rationale: 2 x 3 x 8 x cube + 27 x cube = 945 35 x cube = 945 x cube = 27 = > x = 3 . answer : a
Answer: A