(1) What is the eighth number from left to right in the first line?

(2) What is the eighth number from top to bottom in line10?

(3) In which row and column is101located in this table?

1 3 4 10 1 1 ...

2 5 9 12 ...

6 8 13 ...

7 14 ...

15 ...

...

Xiaoli has 65,438+000 coins in her piggy bank. She changed two cents into nickel coins of the same value, and the total number of coins became 73. She also changed a penny into an equivalent nickel, and the total number of coins became 33. How many pence is there in her piggy bank?

Party A, Party B, Party C and Party D each have an exercise book mixed together, and each of the four people takes one at random.

Q: (1) How many ways can only one person get his exercise book?

(2) How many ways can a person hold his homework?

There are six classes in the fifth grade of experimental primary school. Three math teachers are in charge of these six classes, each with two classes. Now it's time to assign the lessons taught by these three teachers. How many different distributions are there?

How many of the first 1994(0 to 1993) natural numbers contain the number 1?

At 8: 08 in the morning, Xiaoming set off from home by bike. Eight minutes later, his father came after him on a motorcycle and caught up with him 4 kilometers away from home. Then his father went home at once. When he got home, he went back to chase Xiao Ming. When I caught up with him, I was just 8 kilometers away from home. Q: What time is it?

6. Odd numbers are grouped in the form of (1, 3), (5, 7, 9), (1 1, 13) as follows.

(2) What is the sum of the numbers of group19 and group 20?

7. Arrange the four digits consisting of exactly two different numbers in descending order: 1000, 100 1 0,10, ... 9997, 9998. So what is the 200th number in this series?

8. An old protractor, most of the scales are worn out, only the following scales can be seen clearly: 0, 4, 10, 16, 43, 89, 180. When measuring angles with this protractor, there are several angles (no more than 80 degrees).

The four numbers 9.9, 8, 7 and 6 can form 24 four-digit numbers, and there are no duplicate numbers. Find the sum of these four numbers.

10. Of all the natural numbers from 1988 to 889 1, how many digits are different from single digits?

1 1. At present, there are 4 RMB for 1 cent, 2 RMB for 20 cent and 3 RMB for1yuan. How many different kinds of money can you earn if you take at least one and at most nine?

12. Please write ten natural numbers so that the sum of one or more of them is equal to any number between 1 and 1000. What are the ten numbers?