this is a simple train question
there is a train and there is 10 people in the train
on the first stop 5 people get off
on the next stop 2 people get on
on the next stop 10 people get on
on the next stop all people get off
on the next stop half of the people from the stop before get on
on the next stop 10 people get on
on the next stop 3 people get off and 2 people get on
on the next stop 9 people get on and 4 people get off
on the next stop10 people get on and 15 gets off
on the next stop half of the people get off and 10 people get on
on the next stop 20 people get on and then 2 people get off
on the next stop 4 people get off
on the next stop 10 people get off
how many stops did we pass?
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