27 is my answer.Because 8×3=24÷2=12×3=36......
We have sequence as 8×3=24 24/2=12 12×3=36 36/2=18 18×3=54 54/2=27
So, next bunker will be 27
Let see how this series is created: . -8 . -8 + 32 = 24 . 24 -12 = 12 12 equals 24 divided by 2 . 12 +24=36 36 equals 12 times 3 . 36 -18 = 18 18 equals 36 divided by 2 . 18 + 36 0 54 54 equals 18 times 3 Then the missing number will be 54 divided by 2 equals 27 Solution: 27
On behalf of Sture Sjöstedt