Puzzles

Puzzle (and answer): Time Equations

by Josh Salcman March 30, 2010 Puzzles
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Okay, so we let this one slide a bit. Sorry about that. This puzzle was originally published quite a while back, and we never got around to posting the answers. Time to correct our mistake. First, a reminder of the rules… Here are the rules. You must find an equation with the given numbers; inequalities would [...]

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Puzzle: Time Equations

by Josh Salcman February 20, 2010 Puzzles

If you enjoy playing games with math, the way we do, you’ll see numerical relationships everywhere.  For example, when turning to page 64 in a book, you might note the number 64 as a perfect square, a perfect cube, and a number which has many factors.  A fun way to project math on the world around [...]

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Puzzle Answer: Tricky Triangles

by Josh Salcman February 15, 2010 Puzzles

Here’s the explanation for the puzzle of the mysterious triangles…

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Puzzle: Tricky Triangles

by Josh Salcman February 12, 2010 Puzzles

Both composite triangles have a base of 26 units and a height of 10 units, giving them an area of 130 units2 each. Both of them are made up of congruent shapes, but in different arrangements.  Yet it appears that the bottom triangle has an extra 2 by 2 space. Where did this space come [...]

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