Tanisha's office is on the 9th floor of an office building. she parks her car in the underground parking garage 4 floors below ground level. how many floors are between tanisha's office and her car?

Answer

13 floors

Explanation

The question is testing the number line concept.

Let the ground level be the origin, the floors above it be positive and  the underground floors be negative.

So. her is in the +9th floor

The car is at -4th floor

The floors between them  = 9 - -4

                                           = 9 + 4

                                           = 13 floors.