Question

11,6,5,9,16, ?

a) 66.5 b) 78.4 c) 89.5 d) 42.5

explain also how ?​

Answer 1

Answer:

11 ×0.5 + 0.5 = 6

6 ×1 – 1 = 5

5 ×1.5 + 1.5 = 9

9 ×1 – 1 = 16

16 ×2.5 + 2.5 = 42.5 (Ans)

(Mark as brainlist)