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8) 9 + 9 + 9 -2 = 25 + 2 -2 (adding -2 to both sides of the equation to cancel the +2 on the right side, which means the bellhop returned the tip or gave a discount of $2) 9) 9 + 9 + 9 - 2 = 25 10) 27 - 2 = 25 11) 25 = 25. The puzzle should subtract the bellhop's tip from the $27 rather than add it. History. There are many variants of the puzzle.
The Ages of Three Children puzzle (sometimes referred to as the Census-Taker Problem [1]) is a logical puzzle in number theory which on first inspection seems to have insufficient information to solve. However, with closer examination and persistence by the solver, the question reveals its hidden mathematical clues, especially when the solver ...
Puzzles. A brain teaser is a form of puzzle that requires thought to solve. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves lateral thinking. Logic puzzles and riddles are specific types of brain teasers. One of the earliest known brain teaser enthusiasts was the Greek mathematician ...
Brain teaser puzzles cover a broad range, from multi-piece posers you take apart and reassemble to 3D jigsaws. Multi-piece puzzles are either lock-based (which involve pulling apart and putting ...
Coffee may help keep eyes healthy. Egypt's pyramid construction secret: Just add water. The dirtiest (and cleanest) produce on the market. Some of these brain teasers are pretty tough, while ...
GooToobz. If the 8-year-old in your life is always looking for a new way to busy their hands, GooToobz has them covered. A windy pathway is filled with goo, glitter and other objects, and kids get ...
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