Xiaoming's family has an alarm clock, which is 2 minutes faster than the standard time every hour. At 9 o'clock on Sunday morning, he aimed at the alarm clock and then adjusted it. He wants the alarm clock to ring at 1 1: 30, so when should he set the alarm clock?
5 points for each of the following questions, *** 120 points.
1、 1+2×3 (4+5)×6= .
2、(2+4+6+……+2006)-( 1+3+5+7+……2005)= .
3、9000-9= ×9
4. Please observe the following formula:
2+4=6=2×3,
2+4+6= 12=3×4
2+4+6+8=20=4×5
……
Then calculate: 2+4+6+...+ 100 =.
5. Careless calculation 1 the average of 2006 consecutive integers by 2006. When calculating the sum of the figures in 2006, he omitted one of them, but he still calculated the average according to the figures in 2006, and the result was less than the number that should be obtained 1. The missing number in the careless sum is.
6. Arrange the different three digits with the sum of each digit as 10 in descending order, and the number 10 is.
7. A two-digit number, plus nine times its one-digit number, is exactly equal to 100. The sum of this two-digit number is.
8. I hope the primary school will hold a sports meeting. All athletes' numbers are consecutive integers starting from 1 As shown by the solid line in figure 1, they are arranged in a square matrix from the row of 1 to the column of 1. Xiaoming's number is 28, which ranks in the third row and the fourth column, so there are athletes.
9. There are 5,000 households in a town, each with no more than two children. Some families have one child in each household, and the other half have two children in each household, so this town has one child.
10, a box of tomatoes with boxes weighs 48kg. After half of the tomatoes and radishes are sold, the remaining tomatoes and radishes, together with boxes and baskets, weigh 38kg. Then a box and a basket weigh 100 kg.
1 1. In a test, Xiaoming got 10 wrong, Xiaogang got 8 wrong and Xiao Qiang got 3 wrong. There is something wrong with this exam.
12. In order to spend the winter, both the white rabbit and the little black rabbit have reserved some carrots. It is known that white rabbits store three times as many carrots as little black rabbits. After each of them ate five carrots, the number of carrots left by the little white rabbit was four times that of the little black rabbit. Then they have one carrot left.
13, as shown in Figure 2, the side length of the square ABCD is 6 cm. If you draw a straight line through any two points in a square, the square can be divided into nine small rectangles. The sum of the perimeters of these nine small rectangles is 10 cm.
14. As shown in Figure 3, if the vertex of the right angle is on the straight line L, then the sum of all comparisons less than the right angle in the figure is degrees.
15. As shown in Figure 4, six identical rectangles surround two squares. Given that the area of a small square is 36 square centimeters, the area of each small rectangle is square centimeters.
16. Figure 5 is the statistical chart of Xiaohua's five math exams. The average score of Xiaohua's five tests is.
17. According to Figure A and Figure B, it can be judged that the balance end in Figure C will sink. (Fill in "left" or "right")
18. One morning, there were 200 bacteria in the container. When there is light during the day, the number of bacteria in the container will decrease by 65, and when there is no light at night, the number of bacteria in the container will increase by 40. Then on the first day, all the bacteria in the container died.
The idiom "a foolish man is a mountain" means that you have perseverance and are not afraid of difficulties. Suppose the mountain in front of Gong Yu's house weighs 800,000 tons, Gong Yu has two sons, and his two sons have two sons respectively, and so on. Gong Yu and his descendants can carry 100 tons of stones in their lifetime. If Gong Yu is 1 generation, then in the first generation, this mountain can be moved. (It is known that the product of 10 multiplied by 2 is equal to 1024).
20. The distance between Port A and Port B is 400 kilometers. A ship can go downstream from Port A and reach Port B in 20 hours. As we all know, the speed of a ship with current is twice that of a ship with current. On one occasion, the ship encountered an emergency on the way from Port A to Port B. After sailing in the opposite direction for a certain distance, it turned around and headed for Port B, and it was 9 hours late. The ship traveled thousands of meters more than usual on this voyage.
21.One morning in late September, Mr. Wang left for a business trip (late September refers to the last day of the month 10) and returned home on the fifth night. The sum of the dates of these five days is exactly 90 (the date number refers to B in A and B, for example, 19, and the date number in March is 19). (Fill in month and date)
22. In the entrance examination of a school, some students who applied for the exam were admitted, and the average score of the admitted students was 6 points higher than the admission score, while the average score of the students who were not admitted was 24 points lower than the admission score, and the average score of all candidates was 60 points, so the admission score was.
23. Mr. Zhou and Mr. Wang are walking along the ring road of the school. Mr. Wang walks 55 meters per minute, and Mr. Zhou walks 65 meters per minute. It is known that the circumference of the avenue is 480 meters, and they walk back from the same place at the same time. After their 10 meeting, Mr. Wang went back to the starting point.
Beijing time is five hours earlier than Moscow time. For example, 9: 00 Beijing time and 4: 00 Moscow time. One day, Xiao Zhang flew from Beijing to Moscow. The plane took off at 15: 00 Beijing time and flew for 8 hours. When the plane arrived at its destination, it was Skopje time. (Fill in hours and minutes according to the 24-hour time system)
I hope it helps you!