Intelligence is a very important indicator. It is related to the living environment and genetic genes. People with high intelligence are often more likely to succeed than people with low intelligence. According to anecdotal reports, the average intelligence in the world is the highest. Your race is Jewish. So, would you like to know how high your IQ is? Come and test it out! Take a look at how many of these 15 IQ test questions you can get right.

1. Can you figure out the answer from the following pictures?

Test answer:

1 apple = 7

12 grapes 5 apples (7)

One apple = 1 three bananas (6)

One apple, 11 grapes, 1 grape and banana = 20

2. There is a country's law that only fruits can be sold on Sundays. It is a time-sensitive and perishable commodity, and it is against the law to sell a commodity like a book that will not lose its usefulness in a short period of time. So what should you do to sell both items legally on Sunday?

Answer: The store can increase the price of fruit and give away some books with every purchase.

3. A cat found a mouse running 10 steps away from it, and the cat chased after it. The cat has long steps. It takes 5 steps to run, while the mouse takes 9 steps. But the mouse moves very quickly. In the time it takes the cat to run 2 steps, the mouse can run 3 steps.

Excuse me: at this speed, can the cat catch up with the mouse? If so, how many steps does it have to run to catch up?

Answer: Yes, it takes 60 steps to catch up with the mouse.

4. There is a rectangular cake, and a rectangular piece is cut off (the size and position are arbitrary). How can you cut the remaining cake into two equal pieces with a straight knife?

Answer: Connect the center of the complete cake with the center of the cut piece of cake. This method also works with cubes. Please note that the size and position of the cut piece of cake is arbitrary. Don’t get caught up in the way you cut your birthday cake. Get out of the box.

5. Three people went to stay in a hotel and stayed in three rooms. Each room cost $10, so they paid the boss $30 one day. The next day, the boss thought the three rooms only cost $25. Yuan was enough, so I asked the boy to return $5 to the three guests. Unexpectedly, the boy was greedy, so he only returned $1 to each person, and secretly took $2 for himself. In this way, each of the three guests spent nine yuan, so The three of us spent $27 each, plus the younger brother ate up just over $2, so the total was $29. But when the three of them paid $30 a ***, where was the remaining $1?

Answer: Not nine yuan per person per day, but (25/3) 1 per person per day. The difference of 1 yuan is 25-24=1

6. A manager has three daughters , the sum of the ages of the three daughters is equal to 13, and the sum of the ages of the three daughters is equal to the manager's own age. A subordinate already knows the manager's age, but still cannot determine the ages of the manager's three daughters. At this time, the manager said that there is only one The daughter’s hair was black, and then the subordinate knew the ages of the manager’s three daughters. What are the ages of your three daughters? Why?

Answer: This manager has twin daughters, their ages are: 2 years old. 2 years old.

9 years old; the manager's age is 32 years old; there are the following possibilities: 1*1*11=11, 1*2**10=20, 1*3*9=27, 1*4*8=32, 1 *5*7=35, {1*6*6=36}, {2*2*9=36}, 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, and among them, only one daughter has black hair, indicating that one of them is older. , the remaining two are smaller, so there are only 2*2*9=36

7. There are two blind people, they each bought two pairs of black socks and two pairs of white socks, eight pairs of socks. Cloth. The sizes are exactly the same, and each pair of socks has a label attached to it. Two blind men accidentally mixed up eight pairs of socks. How can each of them retrieve two pairs of black socks and two pairs of white socks?

Answer: Put the socks in the sun. After the black absorbs heat, the temperature rises. Four pairs of black and four pairs of white can be distinguished. Just two pairs per person.

8. The three switches outside the door correspond to the three indoor lights respectively. The wiring is good. When controlling the switch outside the door, you cannot see the indoor lights. Now you are only allowed to enter the door once. Make sure the switches and lights correspond. relation?

Answer: Turn on two lights outside the door, one of which is always on, and the other one is turned off after ten minutes; when you enter the house, the one that is always on is the one that is on. Of the two bright ones, the hot bulb corresponds to the one that was just turned off, and the cool bulb corresponds to the one that has not been turned on.

9. You have two jars, 50 red marbles and 50 blue marbles. You randomly select a jar and randomly select a marble and put it into the jar. How do you get a red marble? The ball’s greatest chance of selection? In your plan, what are the chances of getting a red ball?

Answer: The greatest chance of selecting a red pinball: put a red ball in one jar, 49 red balls and 50 blue balls in another jar. The probability of getting a red ball is greater than 50.

10. There are two rings with radii of 1 and 2 respectively. The small circle goes around the circumference of the big circle inside the big circle. How many times does the small circle rotate by itself? If it is outside the big circle, how many times will the small circle rotate by itself?

Answer: You can think of the circle as a rope. The big rope is twice as long as the small rope, so it should be 2 and a half turns.

11.2 A father and son went hunting. Each of them shot a wild duck, but there were only 3 ducks in total. Why?

Answer: 3 grandparents and grandchildren

12. A patient went to the hospital for a health check-up. Why did the doctor say: "Stay away from me?" What disease did the patient have?

Answer: Cross-eyed

13. What is green when uneaten, red when eaten, and black when spit 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 was a group of sheep on the hillside, and a group of sheep came. How many flocks of sheep are there in a ***?

Answer: Still a group of people!

16. If you want to turn your dream into reality, what should be the first step?

Answer: Get up

17. What is it better to turn a blind eye to?

Answer: Shooting

18. Why do newborn children only have one left eye?

Answer: People originally have only one left eye

19. Which tooth will grow last?

Answer: Dentures

20. There was a fire in the room, and Xiao Ming couldn’t open the door. How did he get out?

Answer: Open the door

21. You let a worker work for you for 7 days, and the reward for the worker is a gold bar.

The gold bar is divided into 7 connected segments and you have to give them a segment of the gold bar at the end of each day. How do you pay your workers if you are only allowed to break the gold bar twice?

Answer:

On day1, give section 1,

On day2, let the workers return section 1 to section 2,

On day3, give section 1 ,

day4 returns 1 and 2 paragraphs and gives 4 paragraphs.

Day5 and so on...

22. Please cut a box of cake into 8 parts and distribute them to 8 people, but there must be one part left in the cake box.

Answer: Faced with such a strange question, some candidates racked their brains and couldn't divide it; while some candidates felt that

This question is actually very simple. Cut into 8 First take out 7 portions of the cake and distribute it to 7 people, and distribute the remaining 1 portion with the cake box to the 8th person.

23. Buy tomatoes. The old man bought three tomatoes, and the seller said: "One and a half pounds, three yuan and seven dollars." The old man said: "I'm just making soup, I won't use so much", and then took away the biggest one. The seller weighed it again and said: "One catty, two liang, three yuan." In fact, there is something wrong with the seller's scale. May I ask the old man how to buy the cheapest?

Answer: Give the seller seventy cents and take the biggest one.

24. You have four jars containing pills. Each pill has a certain weight. The contaminated pills are the weight of the uncontaminated pills. 1. How to determine which jar contains the medicine when it is only weighed once? Contaminated?

Answer: Take 1 pill from can No. 1, 2 pills from can 2, 3 pills from can 3, and 4 pills from can 4. Weigh the 10 pills. How much heavier than the normal weight is? There is a problem with the number of cans of medicine.

25. You have a bucket of jelly, including yellow, green, and red. Close your eyes and grab two jelly of the same color. How many do you need to grab to be certain that you have two jellies of the same color?

Answer: 4. Quantity>color type. Colors must be repeated.

26. Perform the following operations on a batch of lights numbered 1 to 100, with all switches facing up (on): for every multiple of 1, flip the switch once in the opposite direction; for multiples of 2, flip the switch again in the opposite direction. ; Dial the switch again in the opposite direction in multiples of 3... Question: What is the number of the light that was turned off at the end?

Answer: There are 10 lights that are off, number 1.4.9.16.25.36.49.64.81.100. Because: every prime number is divisible by 1 and itself, so the prime number light is on. Suppose a composite number can be divided by N numbers, N must be an even number. For the sum of squares other than a certain number, it will be switched on and off N times, which is an even number of times, and the light will remain on; for the square numbers listed above, it will only be switched on and off N-1 times, so the light will be off.

27. Imagine you are in front of a mirror. May I ask why the image in the mirror can be reversed left and right, but not up and down?

Answer: The axis of mirror symmetry is the central axis of the person.

28. There are two rings with radii of 1 and 2 respectively. The small circle goes around the circumference of the large circle inside the large circle. How many times does the small circle rotate by itself? If it is outside the big circle, how many times will the small circle rotate by itself?

Answer: No matter inside or outside, the small circle rotates twice.

29. If every 3 empty beer bottles can be exchanged for one beer, and someone buys 10 bottles of beer, how many bottles of beer can he drink at most?

Answer: After drinking 10 bottles, you can exchange 9 empty bottles for 3 bottles of beer (after drinking, there will be 4 empty bottles). After drinking these three bottles, you can exchange for 1 bottle of beer (after drinking, there will be 1 bottle of beer) 2 empty bottles) At this time, he has 2 empty wine bottles. If he can borrow an empty wine bottle from the boss first, he will have enough 3 empty bottles to exchange for a bottle of beer. After drinking this bottle, the empty bottle will be Just return the bottle to the boss. So he can drink up to 10 3 1 1 = 15 bottles.

30. A group of people had a dance, and everyone wore a hat on their head. There are only two kinds of hats, black and white, and there is at least one black one. Everyone can see the color of everyone else's hats, but not their own.

The host first asked everyone to see what kind of hat others were wearing, and then turned off the lights. If anyone thought they were wearing a black hat, they would slap themselves in the face. When I turned off the lights for the first time, there was no sound. So the lights were turned on again, and everyone watched it again. When the lights were turned off, there was still silence. It wasn't until the lights were turned off for the third time that the sound of slaps could be heard. How many people wear black hats?

Answer: There are three people wearing black hats. Suppose there are N people wearing black. When N=1, black people can be sure that they are black when they see that others are white. So there should be a sound when the lights are turned off for the first time. It can be concluded that Ngt;1. For each person wearing black, he can see N-1 black hats and thus assumes that he is white. But after waiting for N-1 times and no one hits him, every black person will know that he is also black. So when you turn off the lights for the Nth time, N people will hit you.