 space come from? |
Why?
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Place the numbers from 1 to 8 in the grid so that
numerically adjacent numbers are not in adjacent cells.
In this case, we say two cells are adjacent horizontally,
vertically and diagonally.
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What comes next: 1, 11, 21, 1211, 111221, ... ?? | |||
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For every prime p greater than 3, p2-1 is
divisible by 24.
Why? |
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