Cryptorithms

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Translate letters into numbers.

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Can You Get to 100?

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Manipulate digits to get a sum of 100. 

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Multiples of Places

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Find a number with a special relationship between two of its digits.

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Composite Numbers

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Follow the steps in manipulating a number and be surprised by the result!

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Perfect Square Columns

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Find the perfect squares in a given table.

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Sums and Products

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Using sums and products, what’s the largest number less than 50 that you cannot produce? 

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Square Root Patterns

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Find the square root of a huge number.

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The Last Digit

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Determine the last digit in a huge number.

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Making Change

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Find different ways to make change for a dollar.

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Irrational to Rational

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Use square roots to produce integers.

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