FILE No.166Unsolved
At a toy shop, Takeru said, "I'd like this plastic model kit," and handed over 2,000 yen. The clerk asked, "Would you like a new one?" At this shop, a new one costs 1,900 yen and one with scratches costs 1,400 yen.
His friend Koya, who came later, asked for the same kit and handed over one 1,000-yen bill and two 500-yen coins. The clerk, without asking anything, handed over a new one and gave 100 yen in change.
Why did the clerk not ask Koya?
If you get stuck, open the hints one at a time, in order.
How much would be enough for 1,400 yen?
What did Koya hand over?
How much is one 1,000-yen bill and one 500-yen coin?
Why did the clerk not ask Koya?
Choose the answer closest to the truth.
Because the coins and bill he handed over included more than was needed for the damaged one
The answer is "Because the coins and bill he handed over included more than was needed for the damaged one."
The damaged one costs 1,400 yen, so one 1,000-yen bill and one 500-yen coin would be enough. Koya, who handed over a 1,000-yen bill and two 500-yen coins, offered what is needed for 1,900 yen (1,500 yen or more). Handing over "exactly 2,000 yen with two 500-yen coins" is the way someone who means to buy the new one pays.
There was no reservation, and the shop does not take reservations. There is no basis for his being a regular.
Because you do not try to look at the fine details of how the money was handed over.
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