There is a building of ten floors and five basement floors. The floors from bottom to top are represented by integers from -5 to 10, where -5 is the fifth basement floor, 0 is the ground floor, and 10 is the 10th floor. Tracy lives in the eighth floor and she wants to go the third basement floor (floor number -3) to pick-up her car.

How many floors does she need to pass to reach the third basement floor in an elevator?

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Solution

Tracy's current position is floor 8.
She wants to go to the basement floor 3.
From the following number line representation, it is clear that she needs to pass in-total 11 floors to reach the desired location.

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Tracy's current position is floor 8. She wants to go to the basement floor 3. From the following number line representation, it is clear that she needs to pass in-total 11 floors to reach the desired location.

Tracy's current position is floor 8.
She wants to go to the basement floor 3.
From the following number line representation, it is clear that she needs to pass in-total 11 floors to reach the desired location.