KöMaL 2015 K482
In a bicycle factory, the bicycles produced are tested systematically. The brakes are tested on every fifth bike, the gears are tested on every fourth, and the shifter is tested on every seventh one. They manufacture 435 bicycles a day. How many bicycles are issued from the factory per day without anything tested on them?
Official text KöMaL. Quoted with source.
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