There is a column of numbers 1,2,3,2,3,4,3,4,5,4,5,6 The number 2009 in this series is ()

six hundred and seventy

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1. A column of numbers 1, - 2, 3 -, 4, 5, - 6. Find the number 2009, what is the number 2010
2. There is a column of numbers: 1,2,3,2,1,2,3,4,3,2,3,4,5,4,3,4,5,6,5,4, what is the number 2006
3. There is a column of numbers: 1,3,4,7,11,18... To find the number 2006 divided by 6
4. One column number 1, - 2,3, - 4,5 - 6 What is item n
5. Are 1, - 2,3, - 4,5, - 6,7, - 8.2006 the number in this column? If so, which number?
6. Observe the law of the following column numbers: - 1,1,2, - 2, - 3,3,4, - 4, - 5,5 What is the number 2006? It's better to give a brief reason
7. Observe the law of the following column numbers: - 1,1,2, - 2, - 3,3,4, - 4, - 5,5,6, - 6 Then the number 2006 is ()
8. Xiao Ming walked four times along a 50 meter long straight road, 78 steps for the first time, 82 steps for the second time, and 79 steps for the third time, The fourth time is 80 steps. Xiaoming's average step length is about () meters. The number is two decimal places
9. Sasa walked three times along the 80 meter long straight road, 120 steps in the first time, 124 steps in the second time, and 122 steps in the third time. What is the average length of Sasa's step She walked 1020 steps from home to school. How many meters does Sasha's home go to school?
10. Xiao Ming walked along a 70 meter straight road. He took 110 steps for the first time, 111 steps for the second time, 109 steps for the third time and 110 steps for the fourth time. What is the average length of one step
11. A series of numbers are arranged according to the rule, 1 / 1 1 / 2 2 / 2 1 / 3 2 / 3 3 / 3
12. Here is a set of numbers in regular order: 1, 2, 4, 8, 16, 32 Then the number 2004 is A. 2002 power of 2 B. The power of 2 C. The power of 2 D. The power of 2
13. The order of a sequence of numbers is as follows: 1,2,3,4,3,4,5,6,5,6,7,8,7,8. What is the number 150? What is the number 150
14. Observe the following sequence of numbers 1 / 1,2 / 1,1 / 2,3 / 1,2 / 2,1 / 3,4 / 1,3 / 2,2 / 3,1 / 4. Then the number at which position is 74 / 51
15. Observe the characteristics of the following sequence, fill in the blanks with appropriate numbers, and write a general formula for each sequence. 1) 3 / 4,2 / 3,7 / 12, (), 5 / 12,1 Observe the characteristics of the following sequence, fill in the blanks with appropriate numbers, and write a general formula for each sequence ⑴3/4,2/3,7/12,（）,5/12,1/3,... ⑵√5/3,（）,√17/15,√26/24,√37/35,... ⑶2,1,（）,1/2,... ⑷3/2,9/4,（）,65/16,...
16. The following set of regular permutation numbers: 4,8,16,32... The nth number is (), the 2004 number is ()
17. A series of numbers are arranged as follows: 1,3,5,2,4,6,3,5,7,4,6,8, etc. from the first number, what is the sum of the first 100 numbers?
18. A series of numbers are arranged according to the following rules: 1, 2, 3, 2, 3, 4, 3, 4, 5, 4, 5, 6 From the first number on the left to 200 & nbsp; numbers, the sum of which is______ ．
19. Boys account for 54% of the total number in the first semester of the sixth grade in a school Boys account for 54% of the total number of sixth grade students in the first semester of a school. This semester, there are three girls transferred and three boys transferred. At this time, girls account for 48% of the total number. How many boys are there now? Please use the formula to calculate, not x, Y!
20. {(- 135) times (- 271) + 136} divided by (- 136) times (- 271) - 135 Note that below the fraction line is - 136, not - 135, The results should be simplified. There should be a simple way to solve this problem. Do not use a computer. It is best to have a process,