sson 1. Lan in the apartment number? Lan house is in an 8 storey house, each floor has 8 apartments. One day, the class asked Lan: "What is your house in the apartment?" "Ask me some questions, I will answer all your questions, but just say" yes "or" no. "Through these questions you try to figure out how many in the apartment" Huy said: "I will ask, are you in the apartment number 1, number 2, ..., No. 63. So with most 63 questions you will know which apartment you. You say, "I only need 14...
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sson 1. Lan in the apartment number? Lan house is in an 8 storey house, each floor has 8 apartments. One day, the class asked Lan: "What is your house in the apartment?" "Ask me some questions, I will answer all your questions, but just say" yes "or" no. "Through these questions you try to figure out how many in the apartment" Huy said: "I will ask, are you in the apartment number 1, number 2, ..., No. 63. So with most 63 questions you will know which apartment you. You say, "I only need 14 questions, 7 sentences enough to know what floor you are on and 7 you can know exactly what you are in the apartment." Dear children, I have to ask several times to know. How are you Lan in the apartment?
Lesson 2. Game together across the bridge. Four people need to cross a bridge. Because of the weak demand, each time we go not more than two people, and because it is dark, we have to take the light. Four people walk differently, crossing the bridge with corresponding time of 10 minutes, 5 minutes, 2 minutes and 1 minute. Since there is only one lamp, each passage must be carried back to the next person. When two people go together, cross the bridge with a slower time. The following example is a way to go: - 10 minutes to go with people 5 minutes to bridge, 10 minutes to take. - 5 minutes to take the lamp back, take 5 minutes. - 5 minutes to go with people 2 minutes through the bridge, It takes 5 minutes. - 2 minutes to take the lamp back, take 2 minutes. - 2 minutes with people 1 minute over the bridge, take 2 minutes. Total time is 10 + 5 + 5 + 2 + 2 = 24 minutes. Let's try to get away with a little less time as possible, and if less than 19 minutes is great
Lesson 3. Cashmere. Mallard buys 27 apples that are identical in size and volume. However, the salesman said that of the apples on the right is a slightly lighter weight. You use a table scales on both sides to find the apple that light. The minimum number of weighs required. Let's help you find that little apple. If they find that fruit after less than 5 weightings, then it is good.
Viết lại câu
1. Here’s my phone number, because you might need it.
~> In case you need it, here is my phone number
2. Agree to be back by midnight and you can go
~> Providing that you are back by midnight, you can go
3. If the painting is finished by Saturday, we'll pay you extra
~> Finish the painting by Saturday, we'll pay you extra
4. None of the passengers was injured because of the driver's wuick reation
~> But for the driver's quick reation, some of the passengers would have been injured
5. Without you, I would have given up years ago
~> If it hadn't been for your help, I would have given up years ago
6. What would you do if there was an earthquake?
~> Supposing there was an earthquake, What would you do?
7. I didn't have the money so I didn't buy a new hat
~> I would have bought a new hat if i had had the money
8. We won't go away if the weather is bad
~> Unless the weather is bad, we will go away
1. In case you need it, here is my phone number
2. Providing that you are back by midnight, you can go
3.Finish the painting by Saturday, we'll pay you extra
4. But for the driver's quick reation, some of the passengers would have been injured
5. If it hadn't been for your help, I would have given up years ago
6. Supposing there was an earthquake, What would you do?
7.I would have bought a new hat if i had had money