A and B are two interlocking cogwheels having p teeth and q teeth respectively. One tooth on B is painted red. Find the values of p and q for which the red tooth on B contacts every gap on the cogwheel A as the wheels rotate.
A First Product Sudoku
Stage: 3 Challenge Level:
Rosie and Zoe solved this Sudoku, their journey can be found
here. The order with which they filled the Sudoku is marked in
the boxes. This is one possible method of many to help you solve
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