Putting It Together

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Suppose you have a list of numbers from zero to one hundred. How quickly can you add them all up without using a calculator?

Puzzle Picture

HINT: There is a swift way to add these numbers. Think about how the numbers at the opposite ends of the list relate to each other.

(Solution)


Puzzle copied, with permission, from Michael DiSpenzio's book called Critical Thinking Puzzles.

More information is available about this book.

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The Math Forum

10 January 1996