Multiple choice general knowledge math & puzzles I am the smallest square number that is the sum of two different cube numbers. What number am I? 11 10 9 8 Reveal answer Fill a bubble to check yourself C Correct answer Explanation The sum of two different cubes 1^3 (1) and 2^3 (8) is 9. 9 is a square number (3^2). This is the smallest square that is a sum of two distinct cubes.