Find the rule, 16,3.8,9,4. {}, {}. What's in the brackets

Find the rule, 16,3.8,9,4. {}, {}. What's in the brackets

16,3.8,9,4.{27 },{ 2}.
This is a sequence of equal proportions separated by one
16、8、4、2
3、9、27

Fill in the blanks 9,13,16,3,8,25,4,10, ()

Fill in 36 in brackets
The difference between 9 and 13 is 4, 16 is the square of 4
The difference between 3 and 8 is 5, 25 is the square of 5
Similarly, the difference between 4 and 10 is 6. The number in brackets should be the square of 6

What should be filled in the brackets in 0.1, 0.3, 0.9, (), 5.1 and 15.3?

1 / 7 the law I found: the sixth power of 1, the fourth power of 2, the third power of 3, the square of 4, the first power of 5, the zero power of 6. Next: the - first power of 7 may be one seventh 1 16 27 16