1. Xiaoding and Xiaowu toss coins, Xiaoding throws them twice, Xiaowu throws them twice; Xiaoding throws twice, Xiaowu throws twice ... and so on. If Xiaoding throws the same result twice in a row, score 1, otherwise score 0; If Xiao Wu throws at least 1 coin heads up in the result of two consecutive throws, he will score 1, otherwise he will score 0. 10 round.

Xiao Wu is more likely to win. 2. Xiaohong did six tests last month, and the average score of the third and fourth tests was 1 minute higher than the previous two tests and 2 points lower than the latter two tests. If the average score of the last three tests is 3 points higher than the previous three tests, then the fourth test is more than the third test.

3.3. When Ma Xiaohu did an integer subtraction problem, he regarded 1 after the decimal point as 7, the tenth 7 as 1, and the business trip was11,so he got the correct answer.

57.4. In a three-subject league of Roi, the average score of Chinese mathematics is 95, the average score of mathematical English is 99, and the average score of Chinese English is 94. Can you figure out how many points he got in Chinese, Mathematics and English respectively? 5. Red, yellow and white 10 balls are mixed in a cloth bag and pulled out at least once.

Only 13 balls can guarantee that five balls are of the same color. 6.a and B practice running. If A lets B run first 10 meter, A can catch up with B in 5 seconds. If B runs 2 seconds ahead of A, A can catch up with B in 4 seconds. A and B are required to run once a second.

6 meters,

4 meters. 7. Fill in the number 5, 1 1, 23, 47 according to the law.

95, … 8. If the four-digit 6 □□□□ 8 is divisible by 73, what is the quotient? 9. Jia Jia and Yao Yao like cycling very much. One day, they both set off from the same place on the ring road by bike, with their backs to each other. It takes 60 minutes for Jia Jia to ride once, and they meet 45 minutes after the departure. So how many hours does it take Yaoyao to ride around? 10. Several cars carry a batch of goods. If each car is loaded with 3.5 tons, 2 tons of goods cannot be transported away; If each car is loaded with 4 tons, other goods can be loaded with 1 ton after loading this batch of goods. How many tons are there in this shipment? 1 1. A strange plant was cultivated in the laboratory. It grows very fast, twice as much as yesterday's quality and more than 3 kilograms every day. After three days of cultivation, the quality of this plant reached 45 kg. How many kilograms does this plant have? 12.3 the price of pencils and five ballpoint pens is a yuan, and the price of six pencils and four ballpoint pens is b yuan. So the price of a pencil and a ballpoint pen is one yuan.

A+B9 yuan. 13. Every fifth-grade student in a school has subscribed to at least two kinds of publications, including Youth Science News, Children, Story Meeting, Youth Science and Youth Literature and Art, so there must be at least one in this grade.

Only 235 students can ensure that at least 65,438+00 of them subscribe to the same newspapers and magazines. 65,438+04. One day, Li Shifu produced a batch of parts and put them in two piles A and B. If 15 pieces were taken out of pile A and put into pile B, the number of parts in the two piles would be equal. If 15 pieces are taken from the B pile and put into the A pile, the number of parts in the A pile is four times that of the B pile. Stack a used to have parts.

65. Li Shifu made this day.

100 parts. 15. It is known that A24B8 is a five-digit number which is a multiple of 8. Then A24B8 is the largest.

92488, the minimum value is

12408. 16. There are five Fridays in February of a certain year, so this year's 65438+1October 3 1 is a week.

4. Display and analysis 17. There are three coins of 1 yuan, three coins of 50 cents, and coins of 1 piece 1 minute. Using some of these coins, the different amounts you can pay are exactly * * *

19 species. 18. Form a rectangle with a length of16m, and the length and width are equal.

5 meters and

At 3 meters, the area is the largest and largest.

15m2. 19。 Define a new operation "≯" as a ≯ b = 3× a+4× b; Q:

5≯7

(3 ≯ 4) ≯ 2.20. There are 30 classmates getting together. When meeting, everyone shakes hands with others once. How many times do you always shake hands? Display analysis 2 1. There are two buckets of water, one of which weighs 80 kilograms. Pour 6 kilograms of water from the first bucket and give it to the second bucket. The weight of the two buckets of water is exactly the same. How many kilograms did the two barrels of water weigh respectively? I hope I can help you analyze and find your friends. I wish you good grades in the primary school graduation exam. I wish you good health, progress in your study, and ask the teacher in time if you don't understand. Thank you.