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It is necessary to arrange 2 / 3, 5 / 6, 5 / 13 and 11 / 18 in descending order
The first is 5 out of 6. The second is 2 out of 3. The third is 11 out of 18. The fourth is 5 out of 13
According to the rule shown in the figure, the positive integers form the digital pyramid
What's the middle of the 44th floor of the pyramid?
What is the maximum left and right of N rows?
When n is odd, there is only one number in the middle (n ^ 2-N + 2) / 2 and one number in the middle (n ^ 2 + 1) / 2). When n is even, there are two numbers in the middle (n ^ 2-N + 2) / 2 and two numbers in the middle (n ^ 2-1) / 2 and (n ^ 2 + 1) / 2
The order of known numbers is 5 6 7 8 9 10 11 12 1 2 3 4. Please ask a formula to know the position of number 12
Want to know the position of each number, with what formula? The first position is 0.
(a-5) + (n / 12) take the integral part a > = 5
(a + 7) + (n / 12) take the integral part A
RELATED INFORMATIONS
- 1. Number game: the first line 28 7 7 6, the second line 9 9 8 8, the third line () 5 13 16, 5 B, 17 C, 19 D, 47 which one Let's talk about the reasoning process
- 2. Observe the following table 1 2 3 4 The first line 2 3 4 5 The second line 3 4 5 6 The third line 4 5 6 7 The fourth line The first, second, third and fourth columns guess that the number at the intersection of the sixth row and the sixth column should be______ , the number at the intersection of row N and column n should be______ (expressed by a formula containing a positive integer n)
- 3. A math problem. 1.2.7.14.23.34. How to find the law
- 4. Look at the following table ~ and answer what numbers x ~ and y are 0 1 1 1 0 0 1 2 2 5 5 x 2 0 0 5 y 14 16 16
- 5. If a number is a multiple of 2 and 3, it must be a multiple of 6______ ．
- 6. There are 10 red, yellow, blue and white balls, which are mixed and put in a cassette. At least how many balls must be found at a time to ensure that there are 6 balls in the same color
- 7. There are 10 red, yellow, blue and white balls each, mixed in a cassette, and at least one touch out______ In order to ensure that there are six balls in the same color
- 8. There are ten small balls in red, yellow, blue and white. Put them in a cloth bag and find five at a time. How many of them have the same color? 9, 13. What's the rule
- 9. There are 10 red, yellow and blue balls in your pocket. Close your eyes and make sure you can touch many four balls of the same color at a time. How many can you touch What's the formula
- 10. In a box, there are 20 balls of red, yellow, blue, green and white. At least touch a few balls to ensure that there are two balls of each color? Come on the sooner the better Within an hour
- 11. Take 6 / 11, 10 / 17, 15 / 26, 5 / 8, 12 / 19 from small to large, which score is at the top
- 12. The numbers 1, - 1 / 2,1 / 3, - 1 / 4,1 / 5, - 1 / 6 are arranged as follows according to certain rules, First line 1 Second line - 1 / 2 1 / 3 The third line - 1 / 4 1 / 5 - 1 / 6 The fourth line 1 / 7 - 1 / 8 1 / 9 - 1 / 10 The fifth line 1 / 11 - 1 / 12 1 / 12 - 1 / 14 1 / 15 ………… ……………… ………… So, can you write 10 numbers from left to right in line 20?
- 13. Use 2, 1, 6 and 8 to form different three digit numbers, and arrange them in the order from small to large
- 14. Some three digit numbers are divided by 3.5.7 to make up 2. Arrange these three digit numbers from small to large, and the fourth number is
- 15. Numerical reasoning - 1,0,1,8, (), 64 what should be filled in brackets
- 16. What do you fill in the brackets? Why
- 17. Number reasoning: 227238251259,)
- 18. Number reasoning: 1, 2, 3, 7, 16, (), the number in brackets should be? A.58 B.62 C.65 D.68
- 19. The first number in the nth row is () and the nth row has () numbers one 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 . one 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 ......................
- 20. Fill in the following numbers in the corresponding set -(+ 7) - three and half 6.5 + 0.40.2 - (- 3) five thirds 0 + (- 5) - twenty two seventh Set of positive numbers: Score collection: Set of integers: Set of negative numbers: Set of nonnegative numbers: Set of rational numbers: