Brainstorm: Athletes No.65438 +0 ~ 50 line up in turn. The coach ordered: odd athletes stand out! ? The rest of the athletes lined up again. The coach ordered again: odd athletes leave! ? At this rate, there will be only one person left. What's his athlete number? What should I do when the coach gives the order? Even athletes come out! ? Who's the last one left?
A: The former is athlete No.32, and the latter is athlete 1. This problem is solved by the inverse method. When odd athletes step out, the coach has to give five orders, and finally only one person is left. This person is ranked as the top 2 in the next 5 singles, top 4 in the next 4 singles, top 8 in the next 3 singles, top 2 singles 16, and top 32 in the next/kloc-0 singles, that is, No.32 athlete.
When even-numbered athletes get out of the queue, they are simply athletes 1.
Interesting brain teaser 1. The opening of the Millennium War? Xia Lou Lou (say three words) answer: unification.
2. once born, twice cooked. Answer: Be knowledgeable.
Hit the forehead with a stick (as the saying goes) Answer: Grit your teeth.
4. one shot to the tip of the iceberg (in popular parlance, it is four words) answer: unpopular.
5. in a word (say four words) answer: nothing.
6. Arrogance (typing an article by Lu Xun) Answer: Kong Yiji.
7. Sneezing constantly (typing modern literary works) A: The true story of Ah Q.
8. Cold storage (type a word) Answer: Figure
9. Go is always black (with a vulgar title) Answer: Old man.
10. Answer: 3.7.
1 1. The second plum blossom (a calendar term) answer: leap April.
12. The first branch of Dongfeng (using the word "one year old") answers: Huajia
13. Break through the tight encirclement (China movie) Answer: Zero breakthrough.
14. East thief (scientific name of traditional Chinese medicine) A: Equisetum
15. It snows at dusk (TCM name 2) A: It is nocturnal and white.
16. Seven-character collection (typing an ancient text) Answer: Six-character collection.
Observation room? Luowei case (enter the name of a Han dynasty) Answer: Zhang Zifang.
18. Dancing on one foot (playing stationery) Answer: compass
19. But what will make Dragon City fly? Folding the grid (playing a scenic spot in Nanjing) Answer: Mochou Lake
20. personal puzzle (enter a common word) answer: privacy.
2 1. millstone (common words) Answer: research
22. Ningbo (a common word) Answer: Level.
23. Run (type a common word) Answer: Steps
24. Everyone laughs? Dovetail grid (a common word) Answer: Optimism.
25. Replace the father? Roller shutter (with two titles) Answer: michel platini, stepson.
26. Being a lover is enough. Answer: porter.
27. Fall to the ground in the middle of the night (call a title) Answer: Born late.
28. The grand occasion is unprecedented (called a title) Answer: Big Brother.
29. Life and death depend on each other (a title) Answer: wife
30. Mr. Wang is in the hospital and the students are in front of the bed. Answer: practical nurse.
Characteristic brain teaser 1. Soil is a mountain, and you can't walk fast when you see water. Adding clothes can keep out the cold. Answer: skin.
A bachelor as blind as a bat often walks into the boudoir door and sees beautiful women, wearing silk. Answer: sewing needle
3. From the sea, the sky floated, the white face turned black and tears flowed out. (Hit a natural object) Answer: Cloud.
I was born at the beginning of the new year, and I don't know who to make enemies with. Dig me a piece of meat every day until the end of the year. Answer: Calendar.
5. Small body, big head, only say one word all one's life, and when the tail is pulled, the enemy will be afraid. Answer: Grenade.
6. Although the river is famous for its sky, there is only light when there is no water, that is, there is a wind of 10, and there is no wave or wave. Answer: the Milky Way.
7. Two boats, no oars and no awnings. Ten children, split up. Come and go during the day and go to the boat at night. Answer: shoes.
8. Sanmao is light and likes to jump. Answer: Shuttlecock.
9. Scrape fish scales, put stones on them and hide them in bones to strengthen people. Answer: phosphorus.
10. Like sugar, it is round and square, which helps you correct your mistakes and is not afraid of dirt. Answer: Eraser.
1 1. With an oblique head and a rope around the neck, the stomach is full and the neck is tight. Answer: cloth bag.
12. Small parts are praised by everyone. Where to settle down, there are many machines. Answer: screws.
13. A big gourd is divided into two halves, and no one can get it. (Dial a number) Answer: 8
14. This star is unusual. Its long tail glows like a golden broom and hides after crossing the night sky. Answer: Comet.
15. red rooster, white tail, blink, thousands of miles. Answer: lightning.
16. Little people are hard to find, humming and licking everywhere. (Hit an animal) Answer: Mosquito.
17. It's strange that there is a kind of bug that eats leaves instead of vegetables. It is white, thin and long, and it spits out silk to build a room. Answer: Silkworm moth.
18. When I was young, I scraped my bones and got cramps, listened to some sweet words and watched people turn over. Answer: Summer sleeping mat.
19. A pile of ash on the mountain will not be removed. Answer: fog.