400
Mr. Becker went into Ms. Schenker's closet and dumped all of her organized shoes into a pile on the floor. If Ms. Schenker wants to put her shoes back in order, how many pairs of shoes can she make with the 31 shoes on the floor? What prank did Mr. Becker pull this time?
She can make 15 pairs of shoes...BUT one shoe is missing?! Mr. Becker took one of Ms. Schenker's shoes and hid it in her refrigerator.