Find the rule: 4 out of 9, 2 out of 9, 1 out of 9, (), 1 out of 36, (), ()

The rule of the number in this line is that the former number is twice the latter number
So the number in the first bracket is 1 / 9 △ 2 = 1 / 18
The number in the second bracket is 1 / 36 △ 2 = 1 / 72
The number in the third bracket is 1 / 72 △ 2 = 1 / 144

RELATED INFORMATIONS

1. Four out of nine, two out of nine, one out of nine, (), one out of 36, () find the law
2. Find the rules P1, 4, 13, 40, 121
3. Find the rule: 1.5, 4.5, 13.5, (), 121.5 1,5,9,13,…… The tenth number is ()
4. Find the rule: 1, 4, 13, 40, 121? I want to write an algebraic expression
5. What is the law between the numbers 9, 1, 4, 3, 40121
6. 15% of a number is 40, and 1 / 4 of it is 60 ()
7. Find the rules 6,13,27,49, (), 121, (). How to fill in the brackets?
8. 13,27,49,( ),121,( ).
9. What is the law between 6.13.27.49. (). 121. ()
10. Find the rule: 5 11 23 47 () 191 () 5 13 37 109 () () 6 13 27 49 () 121 () There's another group There were four groups as follows 5 11 23 47 （）191 （） 5 13 37 109 （）（） 6 13 27 49 （）121 （） 6 15 38 65 106 （）（）
11. Given that a, B, C, D, e and F are six mutually unequal integers and a × B × C × D × e × f = 36, then a + B + C + D + e + F = ()
12. If the product of six integers a * b * c * D * e * f = 36, a, B, C, D, e and F are not equal to each other, then a + B + C + D + e + F = () a, 0 B, 4 C, 6 D and 8 are solved
13. The voltage of sinusoidal current for lighting is 220 V, what are its effective value and peak value?
14. A batch of fruits are transported from the fruit shop. The weight of apples is 21 kg less than 3 times that of pears. The weight of apples is 49 kg more than 2 times that of pears. How many kg are the pears and apples transported?
15. A large truck drives from city a to city B at 80km per hour. Half an hour after departure, a car chases the truck at 90km per hour. How many hours after departure can the car catch up with the truck?
16. It takes two hours for a small car to go from land a to land B, and four hours for a large car to go from land B to land a. the two cars face each other from 8:30 at the same time
17. The diameter of a car's outer tire is 9 decimeters, and the wheels roll 400 cycles per minute. How many kilometers does the car advance per hour?
18. The speed of the car is 80 km / h, and that of the bus is 45 km / h. (1) after X hours, how many kilometers did the car and bus travel together? (2) after X hours, how many kilometers did the car travel more than the bus?
19. A passenger car and a freight car are going from place a to place B. the passenger car takes 8 hours to complete the whole journey, and the train takes 9 hours to complete the whole journey. These two cars go through the whole journey every hour What's the distance? Which car is faster? Hurry up
20. When Xiao Hong read a story book, she read 5 / 1 of the total pages on the first day, 15 pages less than the first day on the second day, and 3 / 1 of the total pages in two days, Xiao Hong read a story book. On the first day, she read 5 / 1 of the total pages. On the second day, she read 15 pages less than on the first day. On the second day, she just read 3 / 1 of the total pages. How many pages did she read in the two days?