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Puzzle 59.  LAYERING SQUARES

Shown below is an arrangement formed by laying 11 colored squares of similar size one over another.  The red square at the bottom right is the last one to be laid.  Based on the figure shown, determine the order in which the colored squares were laid.

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Bits and Beyond...

PRIME NUMBERS

Prime numbers have captured the hearts of many mathematicians for centuries.  During 18th century, mathematician Christian Goldbach (1690-1764) wrote to Leonhard Euler that he believed it could be shown that every even integer greater than 2 is the sum of 2 primes.  For example, 30 = 23+7 and  36 = 13+23.  Until now, this conjecture has neither been proved or disproved.

 

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