An elevator starts out at the 1st floor. It goes up 4 floors, down 2 floors, up 5 floors, down 3 floors, up 2 floors and stops. What floor is it now on?
1 + 4 - 2 + 5 - 3 + 2 = _______ floor
Let's keep track of the elevator's position step-by-step:
1. The elevator starts on the 1st floor.
2. It goes up 4 floors, so the elevator is now on the 1st + 4 = 5th floor.
3. Then, it goes down 2 floors, so the elevator is now on the 5th - 2 = 3rd floor.
4. Next, it goes up 5 floors, so the elevator is now on the 3rd + 5 = 8th floor.
5. After that, it goes down 3 floors, so the elevator is now on the 8th - 3 = 5th floor.
6. Finally, it goes up 2 floors, so the elevator is now on the 5th + 2 = 7th floor.
Therefore, the elevator is now on the 7th floor.
To determine the current floor of the elevator, we need to keep track of the net change in floors. We can start at the 1st floor and calculate the effect of each movement.
First, the elevator goes up 4 floors, so the elevator is now on the 1st floor + 4 floors = 5th floor.
Next, the elevator goes down 2 floors, so the current floor is 5th floor - 2 floors = 3rd floor.
Then, the elevator goes up 5 floors, so the current floor is 3rd floor + 5 floors = 8th floor.
After that, the elevator goes down 3 floors, so the current floor is 8th floor - 3 floors = 5th floor.
Finally, the elevator goes up 2 floors, so the current floor is 5th floor + 2 floors = 7th floor.
Therefore, the elevator is currently on the 7th floor.