Puzzle Room Escape 41

[Mistery]

Test your intelligence and escape from the puzzle room by solving the puzzles. Good luck and have fun!

Play Here

Please use spoilers for hints and walkthroughs:
[spoiler=Title Here]Enter text here...[/spoiler]

Please do not post a video walkthrough for 7 days.

[Timdogg]

Got the first and last ones

[donaud]

Got all 3... pretty easy.

[slerk]

I found the 2nd and third to be easy and II thought for SURE I had the first one,

90

but no.

[Yvonne]

Only need to do the left one. What goes on the ?
I don't know. Must be something simple but I'm very bad at math.
Done with this one. 2/3 is good enough for me

[bip]

Slerk, You're very close to it! Regard the column

13 - 17 - 21 - are the differences

so 66 plus 25 are 91

I couldn't like the right one; but all done.

[slerk]

Thanks bip. I was foiled by an error in my math.

[tipper75]

Ditto donaud

[jleereaves]

Nice and easy.