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Playing card game: Xiao Ming's back to Xiao Liang, let Xiao Liang operate according to the following four steps: the first step & nbsp; distribute the left, middle and right three piles of cards, each pile has the same number of cards, and no less than two cards; the second step & nbsp; take out two cards from the left pile and put them in the middle pile; the third step & nbsp; take out one card from the right pile and put it in the middle pile; the fourth step & nbsp; There are several cards in the left pile, so take a few cards from the middle pile and put them into the left pile. At this time, Xiao Ming accurately said the current number of cards in the middle pile. What do you think is the current number of cards in the middle pile? Explain your reasons
In the first step, the number of cards in each stack is x (x ≥ 2); in the second step, the left side is X-2, the middle side is x + 2, and the right side is x; in the third step, the left side is X-2, the middle side is x + 3, and the right side is X-1; in the fourth step, when there are (X-2) cards on the left side, take (X-2) cards from the middle, and the number of cards left in the middle is (x + 2 + 1) - (X-2) = x + 3-x + 2 = 5
RELATED INFORMATIONS
- 1. Playing card game: Xiao Ming's back to Xiao Liang, let Xiao Liang operate according to the following four steps: the first step & nbsp; distribute the left, middle and right three piles of cards, each pile has the same number of cards, and no less than two cards; the second step & nbsp; take out two cards from the left pile and put them in the middle pile; the third step & nbsp; take out one card from the right pile and put it in the middle pile; the fourth step & nbsp; There are several cards in the left pile, so take a few cards from the middle pile and put them into the left pile. At this time, Xiao Ming accurately said the current number of cards in the middle pile. What do you think is the current number of cards in the middle pile? Explain your reasons
- 2. Xiaogang and his classmates play a card game. First, they divide the cards into three piles: left, middle and right. The number of cards in each pile is equal to or more than two. Then they go through the following steps Take a card from the left pile and put it in the middle pile, Take three cards from the middle pile and put them in the right pile As many cards as there are in the middle pile, take from the left pile and put them into the middle pile of tribes. At this time, what is the number of cards in the left pile?
- 3. Xiaoli and Xiaogang play checkers. They decide who will go first by playing cards. There are 13 cards in total. The points are 1-13. Do you think the fair rule is () A singular Xiao Li goes first, even Xiao Gang goes first If B is greater than 7, Xiao Li will go first, and if B is less than 7, Xiao Gang will go first The multiple of C 2, Xiao Li goes first, and the multiple of 3, Xiao Gang goes first If D is less than 3, Xiaoli will go first; if D is more than 10, Xiaogang will go first
- 4. Xiaoli and Xiaona use playing cards to play games. One card in Xiaoli's hand is Wang. The probability that Xiaona draws Wang from Xiaoli's hand is 1 / 9. Try to find the number of cards in Xiaoli's hand
- 5. Xiao Ming and I have collected 120 stamps. The number of stamps I collected is 3 / 7 of Xiao Ming's. how many stamps have Xiao Ming and Xiao Li collected? It's an equation!
- 6. Xiao Ming has one eighth more stamps than Xiao Li. Xiao Li has 12 fewer stamps than Xiao Ming. How many stamps does Xiao Li have
- 7. Xiao Li has 50 stamps. Xiao Ming has 20% more stamps than Xiao Li. Xiao Ming has several more stamps than Xiao Li
- 8. Xiao Ming and Xiao Li collect stamps. Xiao Ming collects 1.5 times more stamps than Xiao Li. Xiao Ming collects 20 more stamps than Xiao Li. How many stamps have they collected? What's the formula
- 9. Xiaoming has 50 stamps. Xiaoli has 4 more stamps than 3 / 5 of Xiaoming's. how many stamps does Xiaoli have?
- 10. Xiaohong and Xiaoqiang start from home at the same time. Xiaohong walks 52 meters per minute and Xiaoqiang 70 meters per minute. They meet at a on the way. If Xiaohong starts 4 minutes ahead of schedule and Xiaoqiang walks 90 meters per minute, they still meet at a. how many meters are Xiaohong and Xiaoqiang's homes apart?
- 11. Playing card game: Xiaoming's back to Xiaoliang, let Xiaoliang operate according to the following four steps: first, distribute the left, middle and right three piles of cards, each pile of cards is no less than two, and the number of each pile of cards is the same; second, take out two cards from the left pile and put them in the middle pile; third, take out one card from the right pile and put it in the middle pile; fourth, there are several cards in the left pile, Just take a few cards from the middle pile and put them into the left pile. At this time, Xiao Ming accurately says the number of cards in the middle pile. Do you think the number of cards in the middle pile is () I think it's difficult to solve this problem. It's estimated that it's the IQ reason T ^ t,
- 12. Xiaoming and Xiaoli play poker game 'calculate 24'. Each of them plays two cards. The four cards are 2, 2, 9 and 3. Please list two different calculation tests and help them calculate 24! How to calculate
- 13. On teacher's day this year, Xiao Hong used color coated paper to make semicircular greeting cards, sharing 41.12cm long color rope. How many square centimeters of color cardboard did she use?
- 14. On teacher's day this year, Xiao Hong made a semicircle for her teacher with colored cardboard. In order to make it beautiful, he bought colored rope to glue it to the outside of the card, It took 41012cm long colored rope to make this card. How many square centimeters of colored cardboard did he use? The content is clear, neat and clear Wrong! It's 41.12cm
- 15. On this year's teacher's day, Xiao Hong made a semicircular greeting card for her teacher with colored cardboard. For the sake of beauty, she bought a rope to stick it on the outside of the card It took 41.12 meters of rope to make this card. How many square centimeters of cardboard did he use?
- 16. His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old
- 17. His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old
- 18. Xiao Li is 6 years old, and her father is 36 years old. How many years later, her father's age will be three times that of Xiao Li?
- 19. His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old
- 20. Xiao Li is 27 years younger than her mother, and her father is 4 years older than her mother. The total age of the three is 82. How old is Xiao Li this year?