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Two potential solutions hinging on the reply to a query; are crimson, inexperienced and white the one potential colours the vehicles could possibly be? This meta-question is probably going the actual check of the puzzle; having the ability to spot the “gap” within the necessities given by the puzzle (that not all vehicles in the actual world are both white, crimson or inexperienced).
If the puzzle enforces an alternate actuality the place these three colours are the one choices even for millionaires, then the reply is
three vehicles; one white, one crimson, one inexperienced.
On this case, for every of the three colours, solely
one
of the vehicles can have that colour, and due to this fact two vehicles can’t.
If we’re modelling the actual actual world, then the reply is
two
vehicles, all in a colour aside from white, crimson, or inexperienced, similar to black, silver or blue. On this scenario, the identical vehicles are usually not white, not crimson and never inexperienced, as a result of they’re black (or blue or silver or yellow or…).
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