human
Ned is an explosives specialist racing to deactivate a time bomb on the top floor of a building. The building has twenty flights of stairs to the top floor, and Ned can run up one flight of stairs in eleven seconds. The time bomb has 72 seconds left on the timer, and Ned has spent 165 seconds running up the stairs. How many seconds will Ned have to diffuse the bomb when he reaches it?
assistant
How many flights of stairs has Ned gone up? ** Ned has gone up 165 / 11 = <<165/11=15>>15 flights of stairs.
How many flights of stairs does Ned have left to run up? ** Thus, he has 20 - 15 = <<20-15=5>>5 flights of stairs left to run up.
How many seconds will Ned spend running up the remaining stairs? ** He will spend 5 * 11 = <<5*11=55>>55 seconds running up the remaining stairs to the bomb.
How many seconds will Ned have to defuse the bomb? ** Therefore, he will have 72 - 55 = <<72-55=17>>17 seconds to defuse the bomb.
#### 17