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Cryptograms replace digits with letters. Today's problem only involves three digits, but don't be fooled — it's not simple.

There's a quick and easy way to measure gravity anywhere in the solar system.

A balanced scale stays balanced if we add or remove equal quantities from both sides. Can you solve this balance puzzle?

By extending the sides of regular polygons, we can create interesting star patterns. What happens when we start shading them?

When your car battery loses its charge, what is it actually running out of?

Using a formula isn't always the best way to calculate a probability. Instead, using areas of geometric figures can make things easier.

Your twin took a trip through the stars and came back younger than you, but they think they should be older. Why are they wrong?

With only two containers of different sizes, you might be surprised at how many different amounts are possible to measure out.

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