Answer: 5 pieces.
Brother * * * has 45 yuan. If the eldest brother increases 2 yuan's money, the second brother decreases 2 yuan's money, the third brother doubles it and the fourth brother reduces it to 1/2. At this time, four people have the same amount of money. How much money do they have?
Solution: Boss 8, Raul 12, Raul 5, Raul 20.
3. A rope has two heads. How many heads do three and a half ropes have?
Solution: 8 heads, (half a rope is also two heads)
For a residential building, it takes grandpa six minutes to walk from the first floor to the third floor. Now it takes him six minutes to walk to the sixth floor.
A: 15 minutes
5.24 people are arranged in 6 rows, and 5 people are required to be in one row. Do you know how to arrange them? (hexagon)
6. The park bought back a batch of small toys. 10 for each group, minus 2 points; If each group is 12, then you have just finished scoring, but you will lose one group. Please think about it. How many toys does a * * * have? (This batch of toys ***48)
7. There is a book that both brothers want to buy. Brother is short of 5 yuan, brother is short of 1 point. But two people buy books together, and the money is still not enough. Do you know the price of this book? How much money do they each have? The price of this book is 5 yuan. My brother doesn't have any money. My brother has 4.9 yuan.
8. A family has four brothers and sisters. Their ages add up to exactly 14. Do you know how old they are? (Of course, the age here is an integer. ) (14 can only be decomposed into 2 and 7, so the ages of four people are 1, 1, 2,7, and one of them is a twin).
9. 1 Fold the rope in half, then fold it in half, then fold it in half for the third time, and then cut it in the middle. * * * is cut into many segments?
Solution: Paragraph 9
10. When five straight lines intersect, how many intersections can there be at most?
Solution: 10
1 1. If you have five cats and eat five fish at the same time, it will take five minutes to finish. It takes () minutes for 100 cats to eat 100 fish at the same speed.
Solution: 5 minutes
12. There is a long staircase in front of you. If you take 2 steps, you will finally get 1 step; If you take three steps, you will end up with two; If you take 5 steps, you will end up with 4 steps; If you take six steps, you will eventually take five. Only after seven steps, it is just over, and there is nothing left.
Please calculate, how many steps does this ladder have?
Solution: 1 19 order
Interesting math problems have answers 1, △+○ = 9 △+△+○ = 25.
△=( ) ○=( )
2. Xiaoqing put 1, 2, 3, 4, 97, 98, 99, 100,10/together and arranged them in multi-digit order.1234569/kloc-
3. There is a column of numbers arranged in a certain order: 1, 4, 7, 10, 13, 16, 19, 22, 25. What is the 99th number on the left?
4.3000 MINUS 285, plus 282, MINUS 285, plus 282, and so on, how many times will the result be 0?
5. Square vegetable field with side length12m. If we want to double its area, how many meters will it add on one side and on the other? (writing process)
1. Some people work continuously for 24 days, earning 190 yuan (daily wage 10 yuan, working part-time on Saturdays and having a rest on Sundays, without pay). It is known that he started work on a day 1 in late June, and this month's June 1 happens to be a rest day. Q: What is the date on February when this person finished his work?
2. If the eight numbers 1, 2, 3, 4, 5, 6, 7, and 8 are respectively filled in the following formulas (there are no identical ones), then the formula with the smallest difference is □□□□□□□□ -□□□□□.
Four cars transport 30 tons of cement every day. How many days does eight cars transport 120 tons of cement?
4. Six people in the road repair team will repair a section of road in 45 days. How many days will it take if nine people are added?
1, Xiao Gang weighs 40kg, Xiao Lin weighs 42kg, Xiao Li weighs 38kg and Jun Xiao weighs 52kg. So what is their average weight?
2. The average score of three math exams in winter and winter is 89, and the average score of four math exams is 90. What was the score of the fourth math exam?
3. The fruit company brought in 83 baskets of apples, 74 baskets of peaches, 64 baskets of strawberries and 7 1 basket of pears. Finally, the number of baskets of oranges was 32 more than the average number of baskets of five kinds of fruits. How many baskets of oranges did the fruit company bring?
In a physical examination, the average weight of Xiaohong, Xiao Qiang and Xiaolin is 42kg. The average weight of Xiaohong and Xiao Qiang is 6 kilograms heavier than that of Xiaolin. What's Xiao Lin's weight?