To get to the 1st, 3rd 5th, or 7th floors, you use elevator bank a. To get to the 2nd, 4th, 6th or 8th floors, you use elevator Bank b. If Gwen uses elevator bank b to reach her office which floor is she on?

A. 23rd floor

B. 24th floor

C. 41st floor

D. 35th floor

Option B

Gwen is in 24th floor

Solution:

Given that to get the 1st, 3rd 5th, or 7th floors, you use elevator bank a

To get to the 2nd, 4th, 6th or 8th floors, you use elevator Bank b

From this we see that,

To reach odd numbered floors, we use elevator Bank a

To reach even numbered floors, we use elevator Bank b

If Gwen uses elevator bank b to reach her office which floor is she on?

So if she uses elevator bank b, she must reach even numbered floor

From given options, 23rd floor, 41st floor and 35th floor are odd numbered floor

But option B 24th floor is a even number

So she will reach 24 th floor