An elevator is on the twentieth floor.it goes down 11 floors and then up 5 floors.what floor is the elevator on now?

Hmmm. You said it is on the 20th floor ...

But as Steve pointed out, the question says, "An elevator is on the twentieth floor."

To determine the floor the elevator is on now, you need to perform a simple calculation.

The elevator starts on the twentieth floor and then goes down 11 floors. To find the floor after going down, you need to subtract 11 from 20:

20 - 11 = 9

After going down 11 floors, the elevator is on the 9th floor.

Next, the elevator goes up 5 floors. To find the floor after going up, you need to add 5 to the current floor (which is 9):

9 + 5 = 14

After going up 5 floors, the elevator is on the 14th floor.

Therefore, the elevator is currently on the 14th floor.