100 Floors Level 99

On this Stage we have another math puzzle, confuse? this is guide of 100 floors level 99. Hope this will help you to solve the game. There are five math operations needed to open the door.

100 Floors 99

The answer is

Tap + (use volume button of your smartphone)
Tap button x
Tap button =
Tap button x
Tap - (use volume minus button)

The result of the equation is 15. why? because multipler is higher then adder, so you have to multiply 3x4 first then add it with 3 = 15

That's answer for 100 floors level 99, see next answer still on this site here.