Sandy Wood
Brain Game: Twice None
by Sandy Wood - January 7, 2010 - 7:30 AM

THE SOLUTION:

1.

The numbers represent the number of “on” switches (or “ones”) when counting upward in binary:

1 = 0001
2 = 0010
3 = 0011
4 = 0100
5 = 0101
6  = 0110
7 = 0111, so…

8 = 1000

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