This riddle has confused thousands of people online.
The correct answer is: The store lost $100.
By stealing the $100 bill, the store was already down $100. When the thief used that same bill to buy $70 worth of goods, the store gave him $30 back in change. So in total, the store lost the original $100 (the stolen bill) — $70 in merchandise plus $30 in cash.
Many people overthink it and say $130 or $30, but the real loss is the full $100 that was taken.
Did you get it right?

