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Chapter 4   

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Mirror Apartments

solution

Apartment floor plans

Zoë lives in Apartment 23.

explanation

  • On the first floor, the apartment that is the mirror image of Apartment 4, Carl's apartment, is Apartment 7.
  • On the second floor, the apartment directly above Apartment 7 is Apartment 15.
  • On the third floor, the apartment directly above Apartment 15 is Apartment 23, Zoë's apartment.
  • (Add 8 to each apartment number on the first floor to get the second-floor apartment number directly above it, and then add another 8 to get the apartment number of the third-floor apartment.)

 


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