Does anyone know where there is an intelligence test? There must be a match. Thank you.

IBM social recruitment examination paper 1. A long straight tube with uniform thickness, open at both ends, contains four white balls and four black balls. The diameter of the ball and the diameter of the openings at both ends are equal to the inner diameter of the pipe. Now the arrangement of white balls and black balls is wwwwbbbb, and it is required not to take out any balls, so the arrangement becomes bbwwwwbb.

2. A snail climbed from the bottom of the well to the wellhead. Every day, snails sleep and come out at night. One night, the snail can climb 3 feet, but it will fall 2 feet when sleeping during the day, and the depth of the well is 10 feet. How many days can a snail crawl out?

3. Drawing 1999 straight lines can divide a plane into several parts? An island in the Pacific Ocean is inhabited by aborigines. They don't want to be disturbed by outsiders. One day, an explorer came to the island and was caught by the locals. The native priest told him that you can leave a message again before you die. If this sentence is true, you will be burned to death. If it is false, you will be dismembered. How does the poor explorer survive?

5. How to plant four trees so that the distance between any two trees is equal?

6.27 Young athletes are thirsty after participating in the competition, so they go to small shops to buy drinks and drink shops to promote sales. With three empty bottles, they can exchange them for another bottle. How many bottles can they buy at least to ensure one bottle for each person?

7. There is a mountain. There is a temple on the hill. There is only one way from the temple on the mountain to the foot of the mountain. At 8 o'clock every Monday morning, a clever little monk goes to the foot of the mountain for alms. At 8 o'clock on Tuesday morning, the little monk goes up and down the mountain at any speed. In every round trip, he can always reach the same point on the mountain road at the same time on Monday and Tuesday. For example, once he found that at 8: 30 on Monday and 8: 30 on Tuesday, he walked to three-quarters of the mountain road near the foot of the mountain and asked why.

8. How many cars are there in America?

9. Insert the car key into the door and turn it in which direction to unlock the car?

10 You let people work for you for seven days, and you have to use a gold bar as a reward. This gold bar will be divided into seven pieces. You must give them a copy at the end of work every day. If you could only cut this gold bar twice, what would you give it to these workers?

A train leaves LA for new york at a speed of-0/5 miles per hour. Another train leaves new york at a speed of 20 miles per hour for Los Angeles. If a bird flying 25 miles per hour leaves Los Angeles and flies back and forth between two trains, how far does the bird fly when the two trains meet?

12 suppose a CD rotates like a turntable on a record player. This disc is half black and half white. Suppose you have an unlimited number of color sensors. How many color sensors do you need to place around the disk to determine the direction of rotation? Where should they be put?

13 Suppose the clock arrives at 12. Please note that the hour hand and minute hand overlap. How many times do the hour hand and minute hand overlap in a day? Do you know the exact time when they overlap?

14 You have two jars with 50 red glass balls and 50 blue glass balls. Pick up a jar at random and take out a glass ball from it. How to maximize your chances of getting the red ball? What are the chances of getting the red ball in this way?

Two odd numbers separated by a number in 15 are called odd pairs, such as 17 and 19. It is proved that the number between odd pairs is always divisible by 6 (assuming that both odd numbers are greater than 6). Now it is proved that there is no odd pair composed of three odd numbers.

16 A room has a door (the door is closed) and Three Lamps District. There are three switches outside the house, which are respectively connected with this Three Lamps District. You can manipulate these switches at will, but once you open the door, you can't change the switches. Determine which light each switch controls.

17 suppose you have eight balls, one of which is slightly heavier, but the only way to find this ball is to compare the two balls on the balance. How many times do I have to weigh it before I can find this heavier ball?

18 Suppose you stand in front of the mirror, raise your left and right hands and look at yourself in the mirror. When you raise your left hand, it seems that you raise your right hand in the mirror. But when you look up, you look up in the mirror, not down. Why does the image in the mirror look upside down instead of upside down?

1, the nozzle is bent into a ring.

2 or 8 days (I have climbed 7 feet on the seventh day)

The plane of the 3,0 straight line is 1.

1 (1+ 1), 2 (2+ 1+ 1) and 3 (3+2+ 1+ 1).

Article 1999 (1999+1998+1997+-+2+1+1) is/kloc-0 1990065438.

4. I will be chopped to pieces. If it's real, it's burned. If it's fake, it's real.

5, planted in a pit or arranged according to the vertices of a three-dimensional regular tetrahedron.

6, 18 bottle, 18-6-2 borrow another bottle. After drinking, change three empty bottles into one and return them.

7. It's like two young monks starting from the top and bottom of the mountain at 8 o'clock at the same time. At this time, he can always reach the same point on the mountain road at the same time on Monday and Tuesday.

I don't know

9, clockwise

10, according to 1, 2, 4, 1 on the first day and 2 on the second day.

1 1. If the distance between the two places is akm, fly a/35 * 25 = (5/7) a.

12, two are A and B, both on the left. A is at the top left and B is at the bottom left. If A changes before B, it is clockwise, and B changes before A, it is counterclockwise.

13, 22 times, because the hour hand speed is 0.5 degrees/minute and the minute hand speed is 6 degrees/minute.

The interval between the two encounters is 360 degrees, and it takes 360/(6-0.5) = 655/11min.

24 hours a day is 24*60/65 and 5/ 1 1=22.

14 Take 49 red balls from the red ball jar to the blue ball jar and leave one.

The probability of finding red is1/2+(1/2) * 49/99 = 74/99 = 74.74747%.

15 is the sum of numbers in odd pairs. Can it be divisible by 6?

Prove: Let two odd numbers in an odd number pair be 2x- 1 and 2x+ 1.

The number between them is 2x.

The sum is 6x, divisible by 6.

Prove that there is no odd pair consisting of three odd numbers.

Proof: suppose there are three odd pairs, a, b, c, b, c.

And a < b<c.

Then a and b, b and c, c and a are all odd pairs.

So A+ 1 = B, a+1= c.

So b=c contradiction

So it doesn't exist

16 with switches a, b, c, b.

Turn on a for a while, turn it off and turn on B.

open the door

The lit lamp is connected to B.

The unlit but hot one is connected to the other.

The remaining one is followed by C.

17, twice

Number the balls 1, 2, 3, 4, 5, 6, 7 and 8.

1, 2,3 are placed at the left end of the balance.

4, 5 and 6 are placed at the right end of the balance.

7, 8 Don't let go

If the left end sinks, center 1, 2, 3.

1 on the left, 2 on the right, 3.

Which end sinks is a heavy ball, and 3 that doesn't sink is a heavy ball.

If the correct sinking method is similar

If they don't sink

Put 7 at the left end and 8 at the right end.

It's the heavy ball that sinks to the bottom.