Arrange the positive odd numbers 1, 3, 5, 7 and 9 into 5 columns according to the following table. Which column is 2009 in First column second column third column fourth column fifth column First line 1 3 5 7 The second line 15 13 11 9 The third line 17 19 21 23 The fourth line 31 29 27 25 The fifth line 33 35 37 39 OK, are you sure? 2009 is the 1005th odd number, 1005 △ 4 = 251 So how can we determine which column of 252 he is in?

Arrange the positive odd numbers 1, 3, 5, 7 and 9 into 5 columns according to the following table. Which column is 2009 in First column second column third column fourth column fifth column First line 1 3 5 7 The second line 15 13 11 9 The third line 17 19 21 23 The fourth line 31 29 27 25 The fifth line 33 35 37 39 OK, are you sure? 2009 is the 1005th odd number, 1005 △ 4 = 251 So how can we determine which column of 252 he is in?

Line 252 is even, so it should be in the fifth column

The odd number of the odd number of the odd number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the number of the following is listed into the 5 column: & nbsp: & nbsp & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &The & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp; & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & amp & nbsp & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp & nbsp & nbsp & amp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & & nbsp & & nbsp & nbsp & & nbsp & & nbsp & nbsp & nbsp & nbsp & & & nbsp & nbsp & nbsp & & nbsp & nbsp & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & & nbsp & nbsp & nbsp & nbsp & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & Line 2 of 7; The & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & & nbsp & & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & & nbsp; & nbsp; & nbsp; 17 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;      19           21            23… 27 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 25, 2007 will be held in ()
A. Line 250, column 2 b. line 250, column 3 C. line 251, column 4 d. line 251, column 5

Using two behaviors in a cycle 8, ∵ 2007 = 250 × 8 + 7 = 251 × 8-1, ∵ 2007 in the 251st row, observe the number arrangement of the second, third and fourth columns, and get the number of the third column: 3, 11, 19, 27 The rule is 8n-5, 2007 should appear in the first or fifth column, 2007 should appear in the fifth column of the 251th row, so select D

How many odd numbers are there from 1 to 2009
Including 1 and 2009!

There are 1004 odd numbers in 2008 and 1005 odd numbers in 2009

Cycle all odd numbers into one term, two terms, three terms and four terms as follows: (3), (5,7), (9,11,13), (15,17,19,21),
What is the sum of the numbers in the hundredth bracket?

Answer: 35, 79, 11, 1315, 17, 19, 21. If the nth line has n odd numbers, then the first nth line has 1 + 2 +... + n = (n + 1) n / 2 odd numbers. The 100th bracket is the 100th line. Therefore, the 99th line has (99 + 1) × 99 / 2 = 4950 odd numbers. Therefore, the last odd number in the 99th line is 4950 × 2 = 9900-1 + 2 = 9901

English translation
One day in the summer vacation, the teachers and students of class 6, Grade 8 went camping in Guangming Village, 10 kilometers away from the town. According to the following English tips, they wrote a short passage of no less than 70 words
Tips: enjoy the beautiful view of the country, fly kit, play hide and seek, go fishing, prepare the picnic, take photos, on one's way back home, have a good time

One day of the summer holiday,the students and their teacher In Class six,Grade eight had a picnic in Guangming village 10 kilometers away from the town.There ,they enjoyed the beautiful view of the ...

He didn't come back until ten last night

He wasn't back until 10pm last night.
The one upstairs is wrong

I have to get up before 10 o'clock
Ihaveto__ Fill in three words, thank you

get up early

English translation
I just want to know the match of minutes and hours

It is ten past forty-three now
It is seven to eleven now

Twins look the same?

triplets look the same

The twins look the same. I can't tell the difference_ them.
We always do _ (us) best to help the children in poor areas.
I heard from my penfriend in the USA last month
I _ _ _ _ my penfriend in the USAlast month.

In the third, hear from means to receive a message from