Mike wanted to buy a bike, and he found one he liked at $20, so he bought it. The next day, a friend saw it and offered $30 dollars for it so Mike agreed. He later bought it back for $40. Again someone saw it and offered $50 and again Mike sold it. Mike finally rebought the bike for good for $60. Mike then took it to a bike show where a man told him the bike was worth $40.
Deciding to keep it, did Mike gain or lose money on the transactions? Count the bikes worth in the problem.
(In reply to
re: Answer by Lewis)
The questions asks "did Mike gain or lose money on the transactions?" not "what did mike do?" Since he neither gained or lost, no is the simplest correct answer unless you respond with a single negation symbol. Why overly complicate the answer.