Take a close look at the four dice and the line of numbers below them. Which number should replace the question mark? Make sure that you are extra observant of any patterns that are in the line of numbers as well as any patterns that occur on the dice. Stumped?
The number that should replace the question mark is nine. Why? The combined total of the three numbers on every die equals the number written below it. For the first die, for example, 8 + 4 + 7 = 19; for the second: 8 + 2 + 1 = 11. Following this pattern would explain why the third die is also 11 (5 + 5 + 1) and why the mysterious question mark should be nine (4 + 3 + 2).
If you think you’re a math pro after solving this puzzle, try to solve this “simple” math puzzle for children. It’s supposed to be easy, but it has the Internet stumped.
To test you brain even more, purchase your own copy of Mind Stretchers Volume One. Puzzle editor, Allen D. Bragdon keeps you on your toes with over 150 puzzles.