There are six multiple-choice questions on the test paper, and each question has three options. As a result, the marking teacher found that three answers were randomly selected in all the test papers, and the choice of one question was different from each other. How many people will take the exam at most?
Test answer:
At most 13 people will take the exam.
A hat that can't be sold
Title:
Because the hat couldn't sell for $20, the owner of the men's clothing store decided to reduce the price to $8. But no one wanted it, so we had to cut the price again, to $3.20 each, and finally to $65,438 +0.28. If the price is reduced next time, the boss will have to sell it at the cost price. Suppose he cuts the price according to a rule, can you tell me to what extent he will cut the price next time?
Test answer:
Every time the price is 2/5 of the previous price, so the price of a hat will be 5 1.2 cents at the next price reduction.
What is the best way to buy a ticket?
Title:
Forty-five students from the smelly class went for a spring outing in a scenic spot under the leadership of Teacher Shi. When they were ready to buy tickets, they saw a sign that said, "Please buy tickets for tourists: the fare for each ticket is 2 yuan;" Group tickets can be purchased for more than 50 people, and the fare is 20% off. Many students ask, "How can we buy tickets more economically?" "Teacher Shi said," that's a good question. Let's see who can work it out "
Test answer:
Payable amount for purchasing 46 individual tickets: 2×46=92 yuan.
Amount payable for purchasing 50 group tickets: 2×50×80%=80 yuan.
Buying group tickets is less than buying individual tickets: 92-80= 12 (yuan).
That is, buying group tickets is less than buying individual tickets. 12 yuan, you should buy group tickets.
Who did this?
Title:
One of the three students, Zhang San, Li Si and Wang Wu, did a good deed for the group while others were away. Afterwards, the teacher asked who did the good deed. Zhang San said it was Li Si, Li Si said it wasn't him, and Wang Wu said it wasn't him. Only one of them told the truth. Do you know who did this?
Test answer:
It is Wang Wu who does good deeds. Zhang San said it was Li Si, and Li Si said it wasn't him. Whether Li Si has done good deeds or not, one must have told the truth and the other lied. Only one of the three people told the truth. So, what Wang Wu said must be a lie. This shows that Wang Wu has done something good.