Mr. Resty has two identical 4-story buildings. The first floor has 2 apartment units while the rest of the floors have 5 apartment units on each floor. How many apartment units does Mr. Resty have in all?
Thoughts? Step-by-step reasoning:
In one building, there are 4 - 1 = 3 floors that have 5 apartment units each. Mr. Resty has a total of 3 floors x 5 units = 15 apartment units from the 2nd to 4th floor in one building. So, in one building, there are a total of 15 + 2 = 17 apartment units. Therefore, Mr. Resty has a total of 17 x 2 = 34 apartment units in his 2 buildings.
Thus, the answer is 34.