Scenario
Wheels
A
,
B
,
C
, and
D
are connected with belts as shown. If wheel
A
starts to rotate clockwise as the arrow indicates, can all 4 wheels rotate? If so, which way does each wheel rotate?
Can all the wheels turn if all 4 belts are crossed? If 1 or 3 belts are crossed?
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Source
Puzzle provided by Kordemsky: The Moscow Puzzles (Dover)