In the Minesweeper grid, place four mines so that it remains consistent.

0 1 00 0 0
0 0 1 1 0
0 1 0 1 0
0 1 1 1 0
0 0 0 0 0

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Infinity Competiton
Mathematics Department
The University of Queensland
Brisbane Qld 4072

Closing date 30 May 2001