Multiple choice general knowledge What is 1 + 8 ? 8 9 6 45 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The sum of 1 and 8 equals 9. Starting from 1 and counting eight numbers forward lands on 9. Option A (8) is just the second addend, option C (6) is less than both numbers, and option D (45) is mathematically unrelated.