One conclusion that can be drawn is an alternating: 34 10 33 9 and so on
The missing number is 34. The progressive difference between the numbers doubles: 4 + 2 = 6 6 + 4 = 10 10 + 8 = 18 18 + 16 = 34 34 + 32 = 66
As a wild guess.2734-33 = 133-31 = 231-? =31 - 4 = 27.
26 Edit: a₁ = 8 , a₂= 8 + 2 = 10 , a₃& a₄up by 4, a₅ & a₆ up by 8 , .... by 16 a₄= 18 a₅ = 18 + 8 = 26 => answer
26
48,55,54. The pattern is to add 8, then subtract 1.
1.0303
10 15 33 34 and 17
3
34
35
34 - 67 = -33
33% of 34 = 11.22