Multiple choice general knowledge math & puzzles What is the sum of two consecutive even numbers, the difference of whose squares is 84? 34 38 42 46 Reveal answer Fill a bubble to check yourself C Correct answer Explanation Let the consecutive even numbers be x and x+2. The difference of squares is (x+2)² - x² = 4x + 4 = 84. Solving: 4x = 80, so x = 20. The numbers are 20 and 22. Their sum = 20 + 22 = 42. Option C is correct.