Math brain teasers and answers are extremely difficult.

Brainstorming is a common language in people's lives. thinking the game, by using the sound, form, meaning and grammar of language, attracts people with vivid expressions and ways of breaking through the mindset. The following is my carefully compiled encyclopedia of mathematical brain teasers, and the answers are extremely difficult. Welcome to reading.

1. Xiaohong and her mother are in the same class. Why? (Answer: One is a student and the other is a teacher)

2. Why did the frog lose to the dog in the swimming competition? (Answer: Frog who fouled in breaststroke)

3. How long does it take to finish Peking University? (Answer: A note clock is enough)

Xiaoming always likes to break the alarm clock at home. Why does mother always ask her father who can't repair the clock to repair it for her? (Answer: Xiu Xiaoming)

5. What color are the teeth of black and white babies? (Answer: Babies have no teeth)

6. There is a stick. What should I do if I want to shorten it, but I don't want to cut it off, break it or shorten it? (Answer: Take one that looks like it)

7. How to write zero in Roman numerals? (Answer: Roman numerals have no zero)

8. A man fell into the river and struggled several times. He climbed up from the river, his clothes were all wet, but his hair was gone. Why? (Answer: Because he is bald)

Xiao Ming bought a new sock with only one hole, but he didn't go to the shop assistant to exchange it. Do you know why? (answer: socks)

10, what did you do, but you have to be punished? (Answer: Homework)

1 1. What does everyone want? (answer: sick)

12. What English letters do people like to listen to? (Answer: CD)

13. Where is the cheapest thing in China? Answer: Guizhou

14. Why do hospitals never accept patients? (Answer: Veterinary Hospital)

15, what is more annoying than crows? (Answer: crow's mouth)

16, women's somersault. -Name a foreign city (answer: Babylon)

17. There is a natural black marble. What will happen if you throw it into Qiantang River on September 7th? (Answer: Sink into the bottom of the river)

18, there is a person who was born to your parents, but he is not your brother or sister. Who is he? (Answer: yourself)

19. The hotter the weather, the higher it climbs. (Answer: Thermometer)

20. An old lady got on the bus. Why didn't anyone give up his seat? (Answer: There is room in the car)

2 1, Xiao Wang brushes his teeth and whistles leisurely. How did he do it? (Answer: Brush false teeth)

22. Which is more painful, starting with coconut or watermelon? (Answer: I have a headache)

23. What are the products with the same production date and effective date? (answer: newspaper)

24. There is a cow with its head facing north. It turns right three times, then turns back three times, and then turns right again. Where does its tail turn at this time? (answer: face the ground)

25. What does a fat girl say when she is sick? (Answer: Take care)

26. If tomorrow is the end of the world, why do people want to commit suicide today? (Answer: Have a place in heaven)

27. Why did a healthy couple give birth to a baby without eyes? (Answer: Chicken lays eggs)

28, fox is best at confusing men, so what? How are you? Men and women are obsessed together? (Answer: Alcohol)

29. Xiao Zhang never touches the ground when he walks. Why? (Answer: Also through shoes and socks)

30. Pangpang is a famous diver, but one day, he stood on the platform but didn't dare to jump. Why is this? (Answer: There is no water below)

3 1, which tooth fell out at last? (Answer: Dentures)

32. Why do two tigers have to fight to the death and never give up? (Answer: No one dares to stop fighting)

33. What flies highest? Answer: People, they have flown to the moon.

34. It's raining. Why is the ground dry? Answer: People are in the house.

35. Why can't the water fall on the plate? Answer: That's a keyboard.

36. Can you make a number greater than 3 and less than 4 with three chopsticks? (answer: take pi? )

37. Sasha claims to be an expert in distinguishing the age of hens. His trick is to use his teeth. Why? (Answer: Eat chicken to see if the hen is old or tender)

38. What number should be added between the number 0 and 1 to make this number greater than 0 and less than 1? (Answer: Add one to make it 0, 1)

39. What do you mean, if dad doesn't touch it, he will meet twice? (Answer: upper lip and lower lip)

40. A square table is missing a corner. How many angles are there? (Answer: 50 cents)

4 1, Mrs. Kim has always been outspoken, but what made her suddenly speak hesitatingly? (Answer: Mrs. King hesitated while eating sugar cane)

42. Please think it over. What is the biggest shadow you see? (A: The shadow of the earth, that is, every night)

43.6 How to arrange 24 people in row 5? (Answer: Just arrange in regular hexagon)

44. On the bus, two people are having a heated conversation, but the onlookers can't hear a word. Why? (Answer: This is a deaf-mute couple)

45. Under what circumstances is a person in a real situation of being trampled? (A: On the operating table)

46. The angrier, the bigger the thing. (answer: temper)

47. Ask the doctor about the patient. The doctor only put up five fingers and the family cried. What is the reason? (answer: three long and two short)

48. What fakes are people willing to buy? (answer: wigs, dentures)

49. What gets dirtier the more you wash it? (answer: water)

50. Who is the most disobedient? (Answer: Deaf-mute)