An old Red Army is going to spend 9900 yuan to help out-of-school children. First, he took out 900 yuan to help two out-of-school children. According to this calculation, how many dropouts can the remaining money help?

2.

In Xiaoming's final exam, the average score of Chinese mathematics and foreign languages is 95, and the average score of Chinese mathematics is 96. How many points did he get in the foreign language exam?

3.

A commodity is now 120 yuan, which is lower than the original price by 30 yuan. How much is the price reduction?

4.

In the first quarter, a hotel paid 200,000 yuan at the rate of 5% of the turnover, and 35% of the turnover was profit. How much did this hotel earn in the first quarter?

5.

A school planted a number of trees. On the first day, 10 trees were planted, and the number of trees planted on the second day was twice that of the first day. On the third day, 10 tree was planted. How many trees have these people planted?

6.

There is a pile of goods, and it takes 15 times for car A to transport alone, and 10 times for car B to transport alone. If two cars are transported at the same time, how many times can they be transported?

7.

A car travels from A to B at a speed of 42 kilometers per hour, which can be reached in 15 hours. If it arrives 1 hour ahead of schedule, how many kilometers per hour should it be? (Answer in proportion)

8.

Party A deposits 8,000 yuan and Party B deposits 2,400 yuan. Now both parties have withdrawn the same amount of money, and the remaining money of Party A is exactly 15 times that of Party B. How much money did Party A and Party B withdraw respectively? (Equation solving)

9.

A conical sand pile has a circumference of 62.8 meters and a height of 4.5 meters. What is the volume of this pile of sand? If the sand weighs 1.7 tons per cubic meter, how many tons does this pile of sand weigh? (Keep the whole ton as a figure)