Brain Teaser

Question Each letter stands for a distinct digit, and if letters are different, so are the digits they represent. What digit is E?

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Two trains, each traveling at a speed of are headed toward each other on the same track. At the exact moment the trains are apart,

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Art gallery problems involve finding an unmoving guard (or guards) who can “see” the entire gallery. A guard is able t

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Can Area Reveal Volume? Consider the two shapes inside the two identical cylinders whose radius is equal to its height.

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Can a 10 x 10 grid of cells be covered by 25 1 x 4 pieces?

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All four Kings from a deck of cars are placed face down on a table in a random order. You select two of them, and if both are the

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A system of two symmetrical, identical, water-filled jars is fixed on a turntable. Each jar has a cork—attached to the bottom by

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Question Two of the following statements are true and the other one is false: This statement is true. The first statement is false

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True or False? The sum of two consective triangular numbers is always a square numbers!

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Which string will break first? a. Horizontal String!, b. Vertical String!, c. Both will break at the same time

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If a number n can be factored as a×b then n will appear in row a+b-1. For example the number 6 appears in row 1+6-1=6 but also ro

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Nine consecutive integers are placed in the squares of a 3x3 grid. Every column, every row, and every diagonal add up to the same

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