 
 <prompt> Edward di plumber dey replace one pipe for bathroom wall. E need use 40 feet of copper pipe finish di work. For every 5 feet of pipe wey Edward use, e must use one tightening bolt, and for every bolt, e dey use two washers. E buy one bag of 20 washers for di job. After e finish di bathroom job, how many washers go remain for di bag? <response>: ```If Edward need to use 1 bolt per every five feet of piping, then for a job wey require 40-feet of piping, he go use 40/5 = 8 tightening bolts.
If for every 1 bolt wey he use two washers, then he go need 8 * 2 = 16 washers to complete the job.
if he buy bag wey contain 20 washers, and he comot 16, he go get 20 - 16 = 4 washers wey go remain inside the bag.

The answer go be 4.``` 