Multiple choice general knowledge math & puzzles 5252 + 6969 + 1010 13321 12321 13231 12331 Reveal answer Fill a bubble to check yourself C Correct answer Explanation 5252 + 6969 + 1010 = 13231. Adding the thousands place: 5000 + 6000 + 1000 = 12000. Adding the hundreds: 200 + 900 = 1100, giving 13100. Adding the tens: 50 + 60 + 10 = 120, giving 13220. Finally adding the units: 2 + 9 + 0 = 11, giving 13231.