Help me out with some interesting questions ~ ~ ~ ~ ~ ~

The four great masters and apprentices in the Tang Dynasty all became Buddhas after learning Buddhist scriptures in the Western Heaven, and nothing happened in the sky for a day. Suddenly, they heard the change of Tathagata. For example, the Tathagata said, "Priest Tang, it is 2 1 century, and human science and technology are developing rapidly. We immortals are so happy. All the monsters have long since disappeared. There is no need to do anything to subdue the devil. You three apprentices can't just leave them idle. The Tang Priest should arrive: "The Buddha made it clear." The Tathagata floated the pre-written topic to the Tang Priest, waved his hand and wrote:

The one hundred and ninth difficult:

The golden rope just bypasses the equator of the earth (radius of the earth is about 637 1km) (assuming there is no gap between the earth and the golden rope), and then the golden rope is elongated by15m, and the gap between the elongated circumference and the equator of the earth is even. Can the four of you walk through this gap?

Note: Tang Priest (height about1.88m), Wukong, Bajie, Friar Sand (height about1.68 ~1.80m) and Bai (height about 2.25m).

2. Divide property

The old man is 91 years old, and he has some family property to deal with.

The boss took 10 thousand whole and cried to make him disobedient;

Think about what to do, and one-eighth will be yours;

When the second child heard about this, he took 20 thousand first and brought it down;

One eighth belongs to me; The rest of the brothers will be divided again;

So take it first, then increase it; Take eight more points and one more point;

My brother is too young to understand; In the end, the rest are all owned by themselves;

It's hard to say; Fair, reasonable and cautious;

The old man died, but hoped to live; How many brothers do you have?

Note: each brother scores two parts:

(1) Take some first; (eldest brother 10000, second brother 20000, ...)

(2) Take the remaining eighth.

3. Suwu Shepherd

Su Wuyang falls to the north,

I don't know how many years.

I clearly remember the sky and the moon,

235 laps.

This is the calculation problem of Su Wu's pastoral. In the first year of Emperor Wu of the Han Dynasty (A.D. 100), Su Wu was ordered to go to the Xiongnu, and how many years was he detained as a shepherd? Note that the calendar at that time was only the lunar calendar.

Note: The law of lunar leap year is a leap every three years, a leap every five years, a leap in nineteen years, a leap of 235 months divided by December is July of nineteen years, but there are seven leap years in the nineteenth year of the lunar calendar, that is, seven of them are thirteen months.

Step 4 buy chicken

When Li Hong was in an extracurricular group activity, the teacher gave her a math problem. After some efforts, Li Hong finally found the answer that the teacher thought was correct. The topic is: each cock is worth 5 yuan money, each hen is worth 3 yuan money, and each chick is worth 1 yuan. Now someone has just bought 100 chickens for 100 yuan. Excuse me: 100 chickens, how many are roosters, hens and chickens?

5. guess the house number skillfully

Huan Li is a good friend of Wang Min. Shortly after the summer vacation, Wang Min received a letter from Li Huan, which said, "Welcome to my home. My house number is two digits. The sum of the two numbers is 6, and the product of the two numbers is 9 times the quotient obtained by dividing the two numbers. " Can you help Wang Min guess the house number of Li Huan's house?

6. Guess the hat

The teacher took five hats, three blue ones and two red ones. He blindfolded three clever students, A, B and C, put hats on them, put the rest away, and then untied the blindfolded eyes of B and C. At this time, the teacher announced that whoever could accurately tell the color of the hat on his head would have a prize. B and C looked at other people's hats and thought for a while, but they couldn't answer. At this time, the blindfolded classmate suddenly shouted: "I know, I am wearing a police tactical unit on my head." The teacher said happily, "Good! You guessed it! " Please tell me what A thinks.

7. Who is the champion?

A bicycle race entered the final stage, and five athletes took part in it. According to the results of the preliminaries, there are five possibilities for ranking this competition (each ranking can only have one person):

(1) Xiao Wang is second and Xiao Li is third;

(2) Xiao Li is the first and Ding Xiao is the fourth;

(3) Xiao Zhang is the third and Xiao Zhao is the fifth;

(4) Xiao Wang is second, and Ding Xiao is fourth;

(5) Xiao Zhao comes first, and Xiao Zhang comes second.

After the game, I learned that one of the above five guesses was correct. Please find out the champion of this competition.

8. Guess the age

Several children are playing games together. Xiao Gang said, "Let me guess your age. No matter who you are, just multiply your age by 3, add 6, then divide by 3, and finally tell me the number, and I can guess his age immediately. " Therefore, the guess is very accurate. Do you know what is going on?

9. a small gift for scientists

A scientist went to a school to give an academic report. 63 people in the interest group listened to the report. They were divided into several groups according to their themes and interests. After the scientist finished the report, he said, "Now I have 63 small gifts for everyone!" " The students responded with warm applause. "However, before giving gifts, I have a question. Some students can only give it out if they can answer it, otherwise they will stay in school and send it out if someone answers it. " As a result, the students quickly quieted down, and the scientist continued: "Because when I came, I didn't know how many groups we had and how many people there were in each group, so these 63 gifts were packed in six bags, so when the first interest group came to collect them,

Hearing this, the students immediately calmed down and began to calculate nervously. Soon, Zhao raised his hand and said the number of gifts in these six bags. A heartfelt smile appeared on the scientist's face and the gift was distributed smoothly. Smart students, do you know the number of each bag?

10, dare to compare with Everest.

Mount Qomolangma, the main peak of the Himalayas, is called the "roof of the world", with an altitude of 8848 meters, which is the highest peak in the world. But a piece of paper is not convinced. It said, "Although I am thin, only 0.0 1 cm thick, after I fold it in half for 30 times in a row, my thickness will be more than ten times that of Mount Everest." Students! Do you think this paper is bragging? Please calculate it.

1 1, chess game

There are eight people playing chess at present. The scoring principle is 1 for each game won, 0.5 for each game and 0 for each game lost. In this way, everyone will get different scores. As we all know, the second player scored as many points as the last four players. Do you know who won and lost in the fourth and fifth place competitions?

12, interesting alarm clock

Jun and Qin are playing games. Qin Xiao said to Xiaojun, "You can remember any point on the clock. Then, every time you point to a point with my hand, you add 1 to the number you remember. When it reaches 20, the number I point to must be the point you remember." The result is good. Do you know how Qin Xiao guessed?

13, shake hands

Nine good friends,

Thirty autumns apart,

Hometown just got together,

Meet and shake hands,

Welcome banquet drinks,

How many hands have you shaken,

Please count.

Note: "number" is pronounced sh ǒ u.

Interesting math problems in the first grade of primary school

1, the black rabbit, the rabbit and the white rabbit are racing. Black cotton said, "I'm not the fastest, but I'm faster than the white rabbit." Please tell me, who runs fastest? Who runs the slowest?

() runs the fastest and () runs the slowest.

All three children are older than Fang. According to the following three sentences, please guess who is the oldest? Who is the youngest? (1) Fangfang is 3 years older than Yang Yang; (2) Yanyan is younger than Fangfang 1 year; Yan Yan is two years older than Yang Yang. () Maximum value, () Minimum value.

3. Guess the ages of the three teachers according to the following three sentences.

(1) Teacher Wang said, "I am younger than Miss Li." (2) Teacher Zhang said, "I am older than Miss Wang."

(3) Miss Li said, "I am younger than Miss Zhang." The oldest is (), and the youngest is ().

There are three classes in Guangming Kindergarten. Please guess which class has the least number of students according to the following three sentences. Which class has the largest number of students? (1) The middle class is less than the small class; (2) There are fewer middle classes than large classes; (3) There are more large classes than small classes. The number of () is the least, and the number of () is the most.

All three students are taller than each other. A said: I am taller than B; B said: I am shorter than C; Suppose I am taller than A .. () The highest, () the shortest.

6. Four children are weighed. A is heavier than B, B is lighter than C, C is heavier than A, and D is the heaviest.

The weight order of these four children is: () > () > () > ().

Xiaoqing, Xiaohong, Xiaolin and Xiao Qiang are taller than others.

Xiaoqing said I was taller than Xiaohong; Kobayashi said that Xiao Qiang is shorter than Xiaohong; Xiao Qiang said: Xiao Lin is shorter than me.

Please write down your names in descending order: (), (), (), ().

8. There are four wooden cases. The blue box is bigger than the yellow box; The blue box is smaller than the black box; The black box is smaller than the red box. Please arrange these boxes in descending order.

Box (), box (), box (), box ().

9. Zhang, Huang and Li are the surnames of three children respectively. Please guess the surnames of these three children according to the following three sentences.

(1) A is not surnamed Zhang; (2) Yellow is not C; (3) A and B are listening to a child named Li singing.

A surname (), B surname (), C surname ().

10. Teacher Zhang gave three children a red, white and blue balloon respectively. According to the following three sentences, please guess what color balloons they are assigned.

(1) Koharu said, "I didn't list the blue balloons."

(2) Xiaoyu said, "I didn't get the white balloon."

(3) Xiaohua said, "I saw Teacher Zhang give Blue Balloon and Red Balloon to the above two children." Koharu was assigned () balloons. Xiaoyu was assigned to () balloons. Xiaohua was assigned to the () balloon group.

1 1. Three children, A, B, C, race. Neither A won the first place nor C won the second place. B saw that both A and C had reached the finish line in front of him.

A won (), B won () and C won ().

12. A, B and C all won prizes in a sports meeting. Their respective events are basketball, volleyball and football. Now we know: (1)A is taller than volleyball players; (2) Football players are shorter than C and basketball players. Think about it:

A is an athlete, B is an athlete and C is an athlete.

13, dad bought three balls, two red and one yellow. Both brother and sister want it. Dad asked them to sit back to back. Dad stuffed a red one for his younger brother and a yellow one for his younger sister, hiding the rest of the balls behind him. Dad asked them to guess what color the ball in his hand was, and whoever guessed it correctly gave it to him. So, who can guess right? ( )。

14, three children, Phillips, Xiaonan and Xiaoyang, wearing red, yellow and blue hats respectively, lined up to go forward, and no one looked back. Xiao Nan can see a red hat and a yellow hat. Phillips can only see a yellow hat, but Xiao Yang can't see any hats. Do you know who will go first? Who is the second to leave? Who was the last one? What color hats are they wearing? () walking in the first place, wearing a () hat; () walking in the second place, wearing a () hat; () Walking at the end, wearing a () hat;

15. Three children lined up to play games after class. How many different arrangements can they have at most?

16, a group of children lined up to play games, from back to third, from back to fifth, how many children are playing games?

17, according to the law:

0, 1,3,6, 10,( ),( )。

18, Xiaoming lives on the fifth floor. How many stairs did Xiaoming climb from the first floor to his home?

19. The little monkey and the little rabbit went to pick peaches. The little monkey picked 15 peaches. When the little monkey gave the little rabbit three peaches, they all had the same number of peaches. Do you know how many peaches the rabbit picked?

When Xiaoming came home, he saw his father sawing a steel pipe. Xiao Ming asked his father how long it would take to saw it. His father said to Xiaoming, "It takes 10 minutes to saw a section, and a steel pipe needs to be sawed into five sections." And let Xiao Ming guess how much time it takes. Can you help?

2 1. Mom bought a 18 pencil for her sister and a 10 pencil for her brother. How many pencils did my sister give my brother? How many pencils did the two brothers have?