15 (Fifteen) is a sequential movement puzzle made up
of 15 consecutively numbered sliding blocks, all
placed in a square tray large enough to hold 16
blocks. After the pieces are scrambled, the solver has
to restore the blocks to the original order. You may
make the game easier by lowering the number of blocks
to 8 (3X3) or make the game more challenging by
increasing the number of blocks to 24 (5X5). You may
also insert a picture into the puzzle. This sliding-
piece puzzle is a real challenge, so put your brain to
work and prove how smart you really are.

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