Add "ten" or "one" before rational numbers 2,3,4,5,6,7,8,9,10, Make the sum of them 1

Add "ten" or "one" before rational numbers 2,3,4,5,6,7,8,9,10, Make the sum of them 1

（7/10-2/10）+（5/10-3/10）+（6/10-4/10）+（9/10-8/10）=1

Find the law two thirds. One. Three thirds. Nine fourths

Two thirds. One. Three thirds. Nine quarters. (27 / 8). (81 / 16)

Find the rules and fill in the numbers: 3 / 2, 1, 2 / 3, 4 / 9 (), ()

2 / 3,1,3 / 2,9 / 4,27 / 8,81 / 16. The first number × 3 / 2 is the last number

Find the rules 1, 2, 5, 8, (), (), 13

1,2,5,8,( 9),(14 ),13,
Rule: the odd term before + 4 gets the last term. The even term before + 6 gets the last term

According to the changing rules of sequence 1, 4, 13, 40 and 121, what is the sixth number,
Explanation

1、4、13、40、121
The difference between the first two numbers is 3, and the difference between the second and third numbers is 9, which is the square of 3
The difference between the third number and the fourth number is 27, which is the third power of 3
The difference between the fourth number and the fifth number is 81, which is the fourth power of 3
The difference 243 between the fifth number and the sixth number is the fifth power of 3
243+121=364