Janice's office is on the third floor, and she has to walk up 3 flights of stairs to get to her office.  In a single day, she goes up the three flights of stairs 5 times, down the the three flights of stairs 3 times, and uses the elevator the remainder of the time.  How many flights of stairs does Janice walk (up and down) in a single day?
How many flights of stairs does Janice walk up in a single day? ** Janice walks up 3 flights of stairs 5 times per day, for a total of 3*5 = <<3*5=15>>15 flights of stairs
How many flights of stairs does Janice walk down in a single day? ** Janice walks down 3 flights of stairs 3 times per day, for a total of 3*3 = <<3*3=9>>9 flights of stairs
How many flights of stairs does Janice walk in a single day? ** In total, she walks 15+9=<<15+9=24>>24 flights of stairs in a single day
#### 24