1. Can you work out the answer from the picture below?
Test answer:
1 apple =7
12 Grape 5+ Apple (7)
An apple = 1+ three bananas (6)
An apple+1 1 grape+1 and banana =20.
According to the laws of a country, only fruits, which are time-sensitive and perishable, can be sold on Sundays, and it is illegal to sell books, which will not lose their usefulness in a short time. So what can I do to legally sell these two commodities on Sunday?
Answer: Stores can raise the price of fruits and give away some books every time they buy.
3. A cat found a mouse running in front of it at a distance of 10, and the cat chased it. The cat has a big step. It runs five steps and the mouse runs nine steps. But the mouse moves quickly. A cat can run two steps, and a mouse can run three steps.
Excuse me: Can the cat catch up with the mouse at this speed? If so, how many steps will it take to catch up?
Answer: Yes, it takes 60 steps to catch up with the mouse.
4. There is a rectangular cake, cut off a rectangular one (any size and position). How can I just go down and cut the rest of the cake into two pieces of equal size?
Answer: connect the center of the whole cake with the center of the cut cake. This method also applies to cubes. Please note that the size and position of the cut cake are arbitrary. Don't focus on the way you cut the birthday cake, but jump out of this circle.
Three people went to a hotel and stayed in three rooms, each room cost 65,438+00 dollars, so they paid the boss 30 dollars. The next day, the boss thought that $25 was only enough for three rooms, so he asked his brother to return $5 to three guests. Unexpectedly, my brother was greedy and only paid back 1 USD to everyone, secretly. But at the beginning, the three of them paid 30 dollars, so 1 dollar?
Answer: It is not nine yuan per person per day, but (25/3)+ 1 per person per day, so the difference between 1 yuan is 25-24= 1.
6. A manager has three daughters, and their ages add up to 13, which is equal to the manager's own age. A subordinate knows the manager's age, but still can't determine the age of the manager's three daughters. At this time, the manager said that only one daughter's hair was black, and then the subordinates knew the age of the manager's three daughters. What are the ages of the three daughters? Why?
Answer: The manager has a pair of twin daughters, aged 2 years. 2 years old. 9 years old; The manager is 32 years old; There are the following possibilities:1*1*1=1,1 * 2 * * 10 = 20,/kloc-0. 2*3*8=48, 2*4*7=56, 2*5*6=60, 3*3*7=63, 3*4*6=72, 3*5*5=75, 4*4*5=80, of which there is only one.
7. There are two blind people. They all bought two pairs of black socks, two pairs of white socks and eight pairs of cloth socks. The size is exactly the same, and each pair of socks is labeled with trademark paper. Two blind people accidentally mixed up eight pairs of socks. How can each of them get back two pairs of black socks and two pairs of white socks?
Answer: Put the socks in the sun, the temperature will rise after the black absorbs heat, and four pairs of black and four pairs of white can be distinguished, and one person can have two pairs.
8. The three switches outside the door correspond to the three indoor light areas respectively, and the wiring is good. When you control the switch outside the door, you can't see the light in the room. Now you are only allowed to enter the door once, and determine the corresponding relationship between the switch and the light?
Answer: turn on the two lights outside the door, one of which is always on, and turn off the other after ten minutes; When I entered the room, the light that was on corresponded to the light that was always on. Two unlit lights, the hot light bulb corresponds to the light that has just been turned off, and the cold light bulb corresponds to the light that has not been turned on.
9. You have two cans, 50 red marbles and 50 blue marbles. You randomly choose a jar and another marble to put in the jar. How do you give the best chance to choose red marbles? What are the chances of getting the red ball in your plan?
Answer: The best chance to choose a red pinball is to put a red ball in one jar and 49 red balls and 50 blue balls in another jar. The probability of getting the red ball is over 50%.
10. Two rings with radii of 1 and 2 respectively. The small circle goes around the big circle. How many times does the small circle turn by itself? If it is outside the big circle, how many times does the small circle turn by itself?
Answer: You can think of a circle as a rope. The big rope is twice as long as the small rope, so it should be two and a half turns.
1 1.2 A father and son went hunting. They each shot a wild duck, but there were only three in all. Why?
Answer: Three grandparents and grandchildren.
12. A patient went to the hospital for health check-up. Why did the doctor say "leave me alone"? What happened to the patient?
Answer: Cross-eyed
13. What is green if you don't eat it, red if you eat it and black if you spit it out?
Answer: Watermelon
14. Why does the sun get up earlier than people every day?
Answer: because: people sleep later than the sun!
15. There is a flock of sheep on the hillside, and a flock of sheep is coming. How many sheep are there in a * *?
Answer: It's still a regiment!
16. What should I do first to turn my dream into reality?
Answer: Get up.
17. What is better to turn a blind eye?
Answer: shoot.
18. Why does a newborn child only have one left eye?
Answer: People only have one left eye.
19. Which tooth was last lost?
Answer: Dentures.
20. There is a fire in the room, so Xiao Ming can't open the door. How did he get out later?
Answer: Push the door open.
2 1. You let the workers work for you for 7 days, and the workers' reward is a gold bar. Gold bars are divided into seven consecutive parts. At the end of each day, you must give them some gold bars. If you are only allowed to break the gold bars twice, how can you pay the workers?
Answer:
Day 1 give 1 segment,
On the second day, workers were required to return the 1 segment to the second segment.
On the third day, the 1 segment is given.
Day4 returned to 1 2 segment and gave 4 segments.
Day 5 and so on ...
22. Please cut a box of cakes into 8 parts and give them to 8 people, but there must be another one in the cake box.
Answer: In the face of such strange questions, some candidates are inseparable from their brains; Some candidates believe that
This question is actually very simple. Take out seven of the eight cakes and give them to seven people, and the remaining 1 cakes will be shared with the cake box.
To the eighth person.
Buy tomatoes. The old man bought three tomatoes, and the seller said, "A catty and a half, three dollars and seventy cents". The old man said, "I'll just make a soup. I don't need that much." Then he picked the biggest one. The seller said it again and said, "One pound and two ounces, three ounces". In fact, there is something wrong with the seller's scale. What is the most economical way for the elderly to buy?
Answer: Give the seller 70 points and get the biggest one.
24. You have four jars containing pills, and each pill has a certain weight. The contaminated pill is the uncontaminated weight+1. You only weigh it once. How do you know which jar is polluted?
Answer: 1 jar 1 capsule, 2 capsules in jar 2, 3 capsules in jar 3 and 4 capsules in jar 4. Weigh 10 pills. If it is heavier than normal weight, it is that there is something wrong with the medicine in tank 2.
25. You have a bucket of jelly, including yellow, green and red. Close your eyes and grab two jellies of the same color. How many can you catch to make sure you have two jellies of the same color?
Answer: 4. Quantity > color type. Colors must be repeated.
26. For a batch of lamps numbered 1 ~ 100, all switches are turned on, and the following operations are carried out: toggle the switches in the opposite direction every multiple of 1; A multiple of 2 toggles the switch in the opposite direction again; Turn the switch in the opposite direction again in multiples of 3 ... Q: What's the number of the last light that was turned off?
A: There are 10 lights, namely1.4.9.16.25.36.49.64.81.100. Because every prime number can be divisible by 1 and itself, the prime number light is on. Let a composite number be divisible by n, and n must be an even number. For the composite number other than one party, it will be switched on and off for n times, that is, even times, and the light will remain on; The square number listed above was only switched N- 1 times, so the light went out.
27. Imagine you are in front of a mirror. Excuse me, why can the image in the mirror be upside down, but not upside down?
Answer: The mirror symmetry axis is the central axis of human beings.
28. Two rings with radii of 1 and 2 have a small circle around the big circle. How many times did the small circle turn by itself? If it is outside the big circle, how many times does the small circle turn by itself?
Answer: No matter inside or outside, the small circle turns twice.
29. If one beer can be exchanged for every three empty beer bottles, and someone buys 10 beer, how many bottles of beer can he drink at most?
Answer: After drinking 10 bottles, 9 empty bottles will be exchanged for 3 bottles of beer (there are still 4 empty bottles after drinking). After drinking these three bottles, he can exchange 1 bottle of beer (there are two empty bottles after drinking). At this time, he has two empty bottles. If he can borrow an empty bottle from the boss first, he will have enough three empty bottles for a beer. After drinking this bottle, he will return the empty bottle to the boss. So he can drink10+3+1+1=15 bottles at most.
30. A group of people held a dance, each wearing a hat. There are only two kinds of hats, black and white, and there is at least one kind of black. Everyone can see the color of other people's hats, but not their own. The host first shows you what hats others are wearing, and then turns off the lights. If someone thinks he is wearing a black hat, he will slap himself in the face. The first time I turned off the lights, there was no sound. So I turned on the light again and everyone watched it again. When I turned off the light, it was still silent. I didn't get a slap in the face until I turned off the light for the third time. How many people are wearing black hats?
Answer: There are three people wearing black hats. Suppose there are n people wearing black. When N= 1, the person wearing black can determine that he is black when he sees that everyone else is white. So when the lights are turned off for the first time, there should be a sound. It can be concluded that N> 1. For everyone who wears black, he can see the black hat of N- 1 and assume that he is white. But after waiting for N- 1 times and no one hits himself, every black person can know that he is black. So when the lights were turned off for the nth time, n people hit themselves.