Multiple choice general knowledge What is 1 + 4 ? 4 5 6 7 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The sum of 1 and 4 equals 5. Adding 4 to 1 means counting four numbers forward from 1. Option A (4) is just the number 4, option C (6) equals 1+5, and option D (7) equals 1+6.