Charlie has boots that are five times the size of Sophie's. If Sophie wears size five boots, what is the average size of shoe worn by the two?
If Sophie wears size five shoes, Charlie wears 5 * shoe size 5 = shoe size <<5*5=25>>25
Their combined shoes size for the two is shoe size 25 + shoe size 5 = <<25+5=30>>30
The average for the shoe size the two wear is shoe size 30/2 = shoe size <<30/2=15>>15
#### 15