The most classic smart question in history

1. There are two unevenly distributed fragrances. The burning time is one hour. How can you determine a period of 15 minutes?

2. A manager has three daughters. The three daughters are 13 years old, and the three daughters are years old.
However, a subordinate has known the age of the manager, but cannot determine the age of the manager's three daughters. Then the manager says there is only one female.
Son's hair was black, and the subordinate knew the age of the manager's three daughters. What is the age of the three daughters?
Why?

3. Three people went to the hotel and stayed in three rooms. Each room was $10, so they paid the boss $30,
The next day, the boss thought that the three rooms only needed $25 yuan, so he asked the younger brother to return $5 to the three guests,
Who knows the younger brother is greedy, only returns $1 for each user, and secretly takes $2, which means nine yuan for each of the three guests,
So the three spent a total of $27, plus the younger brother swallowed up not $2, a total of $29. But the three of them paid a total of $30.
What about $1?

4. Two blind people bought two black so and two white so respectively. The eight-so have the same cloth quality and size,
Each so has a trademark paper attached. The two blind people accidentally mixed up the eight-to-eight so. How can they retrieve
What about black so and white so?

5. One train leaves Los Angeles at a rate of 15 kilometers per hour and goes straight to New York. The other train departs from New York at a rate of 20 kilometers per hour.
About to go to Los Angeles. If there is a bird, it starts at a speed of 30 kilometers per hour and two trains at the same time. It departs from Los Angeles and hits
Return to another vehicle and fly back and forth on the two trains until the two trains meet each other. How long is the bird flying?
Distance?

6. You have two cans, 50 red balls, 50 blue balls, one randomly selected and one randomly selected.
How can I give the biggest chance to select a Red Bullet ball? In your plan, what is the exact chance of getting a red ball?

7. You have four cans containing pills. Each pill has a certain weight. The contaminated pills are not contaminated. + 1. Only weighing
Once, how can I determine which jar of medicine is contaminated?

8. You have a bucket of jelly, including %, green, and Red. Close your eyes and capture the jelly in the same color. Captured
Are you sure you have two joos of the same color?

9. For a batch numbered 1 ~ 100, all turn (on) the light for the following *: All the multiples of 1 turn back one switch; 2
You can set a switch in the reverse direction of a multiple. You can set a switch in the reverse direction of 3 ...... Q: It is the number of the light that is turned off.

10. Imagine that you are in front of the mirror. Why can't images in the mirror be upside down, but not upside down?

11. A group of people wear a hat on their heads. There are only black and white hats, and at least one black hat. Everyone can see
Other people's hats do not have their own colors. The host will show you what hats others wear on their heads, and then close them.
Light. If someone thinks they are wearing a black hat, they will slap themselves in the face. Turn off the light for the first time and there is no sound. So turn on the light,
Let's repeat it again. The light is still silent. It was not until the third time that the light was turned off that there was a slap in the face. Question
How many people are wearing black hats?

12. The radius of the two rings is 1 and 2 respectively. The circle is centered around the circumference of the circle for one week. How many weeks have the circle itself been rotated? If
How many weeks does the circle itself rotate outside the circle?

13. 1 RMB for a bottle of soda. After drinking, you can change two empty bottles to one. Q: How many bottles of soda can you drink if you have 20 RMB?

Answer:
1. One is ignited at both ends, and the other is ignited at the other end. After the first is burned, the second C is ignited at the beginning, and 15
2.229, because only 36 = 6*6*1 36 = 9*2*2
3. The three men paid 27 yuan, boss 25, younger brother 2
4. You can get one of each pair.
5. The distance between La and New York is divided by 35 and multiplied by 30.
7. Take a serial number from one and then name it to know.
8. 4
9. When the number of bytes is an integer, the value is greater than that of others. In this way, the numbers 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100 exceed
10. Light is transmitted along a straight line.