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Nine children stand in a circle to play games. There are two meters between them. Do you know how many meters are there in this circle?
2 × 9 = 18 (m) a: this circle is 18 meters in total
ABCDEF six children hand in hand to form a big circle, each person and the left and right two people are the same distance, facing the center of the circle, a's left hand is pulled by D, B's right hand is pulled by C, then, C pulls F's left hand, D stands opposite B. (1) f pulls ()'s left hand. (2) e's left hand is (), ()
（1）D
（2）A D
RELATED INFORMATIONS
- 1. All combinations of four digits from 1 to 9
- 2. According to the above rules, 2010 should be in () A. Line 250 column 4 B. line 250 column 5 C. line 252 column 4 d. line 251 column 5
- 3. Arrange the positive and even numbers into 5 columns according to the following table: Column 1 column 2 column 3 column 4 column 5 The first line The second line 16 14 12 10 The third line 18 20 22 24 The fourth line 32 30 28 26 …… … … … … … According to the rule in the table, even number 2010 should be ranked in row and column; To specific process, to write all the columns of the law of the number! Well, child, I appreciate your courage to challenge difficult problems, but your answer is wrong
- 4. Arrange the positive and even numbers into 5 columns according to the following table: Arrange the positive and even numbers into 5 columns according to the following table: First column second column third column fourth column fifth column The first line The second line 16 14 12 10 The third line 18 20 22 24 The fourth line 32 30 28 26 、、、、、、 According to the above rules, 2000 should be in -
- 5. Arrange the even numbers 2,4,6 in the natural number into the number table on the right (1) Which row and column is 1992 in the number table? (2) Which row and column is 1918 in the number table? 2 4 6 8 16 14 12 10 18 20 22 24 32 30 28 26 34 36 38 38 40
- 6. As shown in the figure, the following matrix consists of 50 even numbers 2 4 6 8 10 12（14 16) 18 20 （22 24 ）26 28 30 ............... 92 94 96 98 100 (1) What is the relationship between the four numbers in the box? (2) If the sum of four numbers is 200, can we find the four numbers? (3) if the sum of four numbers is 2004, can we find the four numbers?
- 7. The following matrix is composed of all odd numbers (1) What is the relationship between the sum of nine numbers in the parallelogram and the number in the middle? (2) If you make any parallelogram box similar to (1) in a number matrix, is there such a rule for the sum of these nine numbers; (3) Can the sum of the nine numbers be equal to 1998? 20051017? If yes, please write down the smallest one of the nine numbers. If not, please give the reason 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 Inside the parallelogram is: 23 25 27 39 41 43 55 57 59
- 8. Connect 1.2.3... 30 and make it a 51 digit number. How much is it divided by 9? How much is it divided by 11?
- 9. There is a column of numbers, the first number is 103, the second number is 51, starting from the third number, each number is the average of the first two numbers, then the number of the 21st number is What is the integral part?
- 10. Compare the number of the following two groups. Which group has the largest average number? One: 51.52.53.54.100. Two: 5.10.15.20.. 200
- 11. 56 people, two rows, the distance between two adjacent people is 50 cm. How many meters is the distance from the first person to the last person in each row
- 12. Line up some natural numbers starting from 1 into the following shape, then the number 1 from the left of line 10 is______ ．
- 13. What is the number 25 of the first line 1, the second line 2, 3, the third line 4, 5, 6, the fourth line 7, 8, 9, 10, the 100th line
- 14. There is a column of numbers a1a2a3. An. Starting from the second number, each number is equal to the difference between one and the reciprocal of the number in front of him. If A1 equals two, what is a2007
- 15. There is a column of numbers, arranged according to a certain rule: - 1, 2, - 4, 8, - 16, 32, - 64 Is it true that the sum of three adjacent ones is 1224? Please give reasons
- 16. Arrange the positive integers according to the rule shown in the figure. If the ordinal number pair (m, n) is used to represent the m-th row from top to bottom and the n-th number from left to right, for example, (4, 2) is used to represent the integer 8. Then (63, 56) is used to represent the number______ ．
- 17. Arrange the positive integers according to the rule shown in the figure. If the ordered real number pair (m, n) is used to represent the m-th row and the n-th number from left to right, for example, (4,3) represents the real number 8, Connect The ordered real pair representing real number 2009 is (- -) 1 -------- first row 3.2 -- second row 4 5 6 -------- third row 10 9 8 7 -- the third row If you want to give me rules, I'll give you extra points
- 18. Arrange the positive integers according to the rule shown in the figure. If the ordered real number pair (n, m) represents the nth row and the m-th number from left to right, such as (4, 2) represents the real number 9, then the ordered real number pair of real number 17 is______ ．
- 19. Natural numbers are arranged in the following matrix in turn. What is the row and column of 2006? 1 2 5 10…… 4 3 6 11…… 9 8 7 12…… 16 15 14 13…… …… … … ...
- 20. The following is a regularly arranged number table, with the formula n as an integer, the number of the nth row and Nth column in the number table is [3Q]