Multiple choice general knowledge What is 1 + 2 ? 2 3 4 5 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The sum of 1 and 2 equals 3. Basic addition is performed by counting two units from 1, landing on 3. Option A (2) is the sum of 1+1, option C (4) equals 2+2, and option D (5) equals 2+3 or 1+4.