![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
What numbers should be filled in the brackets in number reasoning questions 1, 9, 7, 27, 13, (), 19, 63?
(45)
Idea: starting from 1, every other arrangement is 1, 7, 13, 19
That is, 1 + 6 = 7,7 + 6 = 13,13 + 6 = 19,19 + 6 = 27
Starting from 9, every other row is 9, 27, 45, 63
That is, 1 * 9 = 9, 3 * 9 = 27, 5 * 9 = 45, 7 * 9 = 63, 9 * 9 = 81
RELATED INFORMATIONS
- 1. What should be filled in the brackets?
- 2. Write natural numbers in brackets, which is 4 / 7 of the inequality
- 3. What natural number is filled in () below, the inequality holds? 5 / 9
- 4. Inequality 5 / 9
- 5. The following brackets are filled with those natural numbers to make the inequality hold. 2 > 13 / () > 4 / 9
- 6. The following 5 / 7
- 7. Fill in 0-9 numbers in brackets. Each number can only be used once () - () = () - () = () - () = () - () = () - ()
- 8. What number should be filled in the brackets
- 9. 0-9 numbers are filled in the mouth, each number is only used once, mouth ten = mouth ten = mouth ten = mouth + mouth = mouth ten,
- 10. 0.9:1.3 = 0.9 * (): 1.3 * 10 = (:) number in brackets
- 11. Please fill in the numbers 1, 3, (), 15, () in brackets according to your understanding
- 12. Numerical reasoning 0,2,5,11,27,85, () Number reasoning 24,16,0,6,6,2, () Number reasoning 2,7,26,65124, () Numerical reasoning 0,0,1, (), 2,3,4,4,5 () 50 points for all answers
- 13. Number reasoning 1.26.9.124. ().342
- 14. Number reasoning: 0,7 / 8,26 / 27, ()
- 15. Numerical reasoning: 15,27,59, (), 103,; 0,9,26,65124, () 15, 27, 59, (), 103; 0, 9, 26, 65124, (),
- 16. Seeking sequence: 0,9,26,65124, () A.186 B.217 C.216 D.215
- 17. 2．0,9,26,65,124,( ) Help me,
- 18. 0 9 26 65 124 217 （）
- 19. 1,0 ,9,26,65（） A、123 B、124 C、125 D、126 Steps to think about!
- 20. How to calculate 0,9,26,65124, ()