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2. 30 Math Puzzles (with Answers) to Test Your Smarts - AOL

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   To open this safe, you have to replace the question marks with the correct figures. You can find this figure by determining the pattern behind the numbers shown. Answer: 1 and 4. They’re ...

3. Missing dollar riddle - Wikipedia

   en.wikipedia.org/wiki/Missing_dollar_riddle

   There seems to be a discrepancy, as there cannot be two answers ($29 and $30) to the math problem. On the one hand it is true that the $25 in the register, the $3 returned to the guests, and the $2 kept by the bellhop add up to $30, but on the other hand, the $27 paid by the guests and the $2 kept by the bellhop add up to only $29.

4. 10 Hard Math Problems That Even the Smartest People in the ...

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   One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes.”. You check this in your ...

5. The Hardest Logic Puzzle Ever - Wikipedia

   en.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

   The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. [1][2] Boolos' article includes multiple ways of solving the problem. A translation in Italian was published earlier in the newspaper La Repubblica, under the title L'indovinello ...

6. Missing square puzzle - Wikipedia

   en.wikipedia.org/wiki/Missing_square_puzzle

   The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

7. 50 Trick Questions Guaranteed to Leave You Stumped

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   A spoon. 3. You have two coins that equal 30 cents, and one of them is not a quarter. Which coins do you have? A quarter and a nickel (the nickel is the one that isn’t a quarter) 4. If the ...