1, there are six steps, and Xiao Ming goes from bottom to top. If she can only take one or two steps at a time, what are the chances that she will walk up?

2. If today is Saturday, what day is the first day after the 20th power of 2 from tomorrow?

In a month, there are more days on Tuesday than on Wednesday, and more days on Monday than on Sunday. What day is the 5th of this month?

4. What is the square of100-99+98-97+…+2-1?

5、 1×2+2×3+3×4+…… 100× 10 1

6. A certain competition, first prize 10, second prize 20. Now the last four first prizes are adjusted to second prizes, so the average score of the second prize is increased by 2 points, which means that the average score of the first prize is increased by 1 point. How many points did the first prize average over the second prize?

7. There are 15 stops in the middle of a bus line. There are two kinds of express trains and local trains. The speed of the express train is 0.5 times that of the 65438+ local train. The local train stops at every station, and the express train only stops at one station, with a parking time of 2 minutes. The local train leaves for 60 minutes at a time, and the express train leaves from the same starting station, and the train just reaches the end.

8. The elevator in the commercial building transports passengers slowly. Xiaoming and Xiaohong boarded the elevator and went upstairs. Xiaoming takes 25 steps and Xiaohong takes 15 steps, all of which reach the top of the escalator. If Xiaoming is twice as big as Xiaohong, how many steps are there?

9. A car and a big truck met on a 9-kilometer-long narrow road, and they had to reverse to continue their traffic. If the speed of a car is three times that of a big truck, and the speed of two cars reversing is their own speed, then the distance that a car needs to reverse is four times that of a big truck. If the speed of the car is 50 kilometers per hour, how many hours will it take to cross this narrow road at least?

10, the cruise ship went down the river at a speed of 7 kilometers per hour, and went upstream at a speed of 5 kilometers per hour. Two cruise ships set off from the same place at the same time, one went downstream and then returned, the other went upstream and then returned. As a result, after 1 hour, they returned to the starting point at the same time. During this 1 hour, how many times did the two ships go in the same direction?