Fill in the eight numbers of 10.20.30.40.50.60.70.80. In the small circle, so that the sum of the five numbers in each big circle is 210

How are the circles arranged

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1. Use 10, 20, 30 80 eight numbers, respectively fill in the small circle, so that the sum of five numbers on each big circle is equal to 210
2. 20% of 120 is 24 less than four fifths of a number. What's the number? Solve the equation
3. 1. Four fifths of a number is 24% more than 20% of 120. What is this number? The product of 2, 4.8 and 5 is 4 times less than 7 times of a number Please write the process
4. 20% of 120 is 24 less than 4 / 5 of a number. What's the number?
5. 0,6,24,60120,) why?
6. 0,6,24,60,120,210,()
7. 6.24.60.120
8. 0.6.24.60.120. (210), how is it calculated? And 8.8.6.2,
9. Number reasoning: 0,6,24,60120______ A.186 B.210 C.220 D.226 Explain why!
10. 1 / 60 + 1 / 120 + 1 / 210 + 1 / 336 + 1 / 504 + 1 / 720 =? Urgent! 20 points Process! Simple calculation!
11. Find the rules 1,2,3,6,5,10, (), (), () Why, big brothers and sisters
12. Rule finding
13. 1 / 3 + 1 / 6 + 1 / 10 + 1 / 15 + 1 / (1 + 2 + 3 + 4 + 5 +... N) =? Find the law
14. The third number in the twentieth line -1 2 -3 4 -5 6 -7 8 -9 10 -11 12 -13 14 -15 16 Find the third number on the twentieth line
15. Find the law 1,2,5,13,34, (), ()
16. 1,2,5,13,34, () to find the law
17. Find the law, the faster! Give more. 1,1,2,3,5 {} 13,21,34 {} 89
18. Find the law 1 1 2 3 5 α 13 21 34 β 89 α =? Find the law 1 1 2 3 5 α 13 21 34 β 89 α=?β=?
19. On a long enough note, write the natural numbers 1 to 500 from left to right, and then point a comma every three numbers from left to right, such as 123456789101112 The number before the 100th comma is
20. Write 1 ~ 1999 natural numbers from left to right on a long enough note, and then point a comma at each three digit number from left to right: as follows 123,456,789,101,112…… The number before the 100th comma is ()