human
Vincent has 72 inches of rope that he wants to use for a project, but he needs to cut it into smaller pieces first. He cuts it into 12 equal length pieces, but then he realizes it's too short, so he ties three pieces together. The knots then make each piece 1 inch shorter. How long are his pieces of rope after all this?
assistant
How many inches are each small piece? ** Each small piece is 6 inches because 72 / 12 = <<72/12=6>>6.
How many inches are each small piece after the knots are tied? ** Each piece is then 5 inches long after the knots are tied because 6-1=<<5=5>>5
How many inches are the three pieces tied together? ** The three pieces tied together are now 15 inches long because 5 x 3 = <<5*3=15>>15
#### 15