At first, this well-known money puzzle can seem confusing because the story encourages readers to focus on the sequence of events rather than the final financial outcome. A man takes a $100 bill from a store register and later returns to use that same bill to purchase merchandise. Because the situation involves theft, payment, merchandise, and cash change, many people mistakenly assume the store experiences multiple separate losses.
The easiest way to solve the puzzle is by examining each financial step carefully. The original $100 taken from the register is eventually returned when the customer uses it to pay for merchandise. Since the money goes back into the register, it is no longer part of the store’s final loss. This is the detail that often causes confusion for readers trying to calculate the total.
After the payment is accepted, the store provides the customer with $70 worth of merchandise and $30 in cash change. Those are the only items that permanently leave the business. The $100 bill itself simply functions as payment during the transaction and should not be counted again once it has returned to the register.
When viewed clearly, the final outcome becomes simple: the store loses $70 in merchandise and $30 in cash, which equals a total loss of $100. The puzzle demonstrates how careful reasoning and focusing on net value can make situations easier to understand, even when the story initially appears more complicated.