Question

Bob and ling are playing a number pattern game. Bob wrote the following sequence

Answer 1

The rule is decreasing by 2.1 because when you subtract 28.9-26.8 you get 2.1 and when you subtract 26.8-24.7 you also get 2.1
The unknown term is 22.6 because 24.7-2.1 is 22.6

Answer 2

The unknown term is 22.6

28.9
26.8
24.7
22.6
20.5

As you can see, the numbers after the decimal point descends by 1 point. 9 , 8 , 7 , 6 , 5
While the numbers before the decimal point descends by 2 points, 28 , 26 , 24 , 22 , 20