2. If two numbers are randomly selected from 1 to 1000, what is the probability that their sum is even?
3. In the triangle ABC, D is the point inside the triangle. X, y, z and w are the angles of these angles, which should be the ratio of x and y, z and w.
4. What is the smallest positive integer that can divide 225 into 0 and 1?
In the 40-minute fitness time, 25 students want to play basketball, but at the same time only 10 people can play together. How many minutes can each of the 25 students play? T minutes
6. the value of x satisfies both | x-8 | < 6 and | x-3 | > 5, and the value of x satisfies a < x < b.a+b, which is equal to?
7. A pilot flew 80 kilometers. He flew at half speed for the first four minutes and at full speed for the next four minutes. What is the full speed of the plane?
8. After painting, cut a hardwood cube with a side length of 3cm into 27 cubes 1 cm. How many are sprayed on both sides?
Manual translation, I hope it will help you. It has changed. Extra points. . . black