A man buys a horse for $60. He sells the horse for $70.
He then buys the horse back for $80. And he sells the horse again for $90. In the end, how much money did the man make or lose?
Or did he break even?

Paradock
(@paradock)
A man buys a horse for $60. He sells the horse for $70.
He then buys the horse back for $80. And he sells the horse again for $90. In the end, how much money did the man make or lose?
Or did he break even?

-60 +70 -80 +90 +10 +10 +20
20 logic:
start with $500, do everything and you'll end up with $520
10 logic:
bought $60 for $60 value sold $70 for $60 value (+10 so far) bought $80 for $70 value (-10, even again) sold $90 for $80 value (+10 again)
i have no idea how anyone could get anything else, but 20 is the intuitive (imo) and also correct answer??
theory: the man sold to himself
theory: the man lost everything he made to taxes and now he owes 20 dollars to the IRS