Answer if you are Genius 99% fail

[xamir15]

Comments

[ethanthefighter]

8!

[greenrun]

Not a genius :) But judging from the pipe's position, I'll go with tank No. 7.

[marcinrogowski]

!!

[jamiesamain]

7

[pele23]

7 of course!

[dynobryno]

7

[roido-san]

11

[konmogelijk]

I think it's 7! Look at the Tanks positions