But it also tripped up some adults who were confused about whether to divide the sum by nine instead of eight. One wrote: 'Wouldn't there be 9 if Sean is getting some, too? That's what would trip ...

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A brain teaser has left people across the internet scratching their heads - but far from a complicated algebraic puzzle, it's just a simple addition sum leaving them bewildered. Shared by self ...

Puzzles from the Magic Puzzle Company truly are magical, and one of the best puzzle brands. Not only does this puzzle, called The Mystic Maze ... more model kits for adults.