Students often give creative solutions to problems that are unexpected and often humorous.
For example, teacher S.D. gave this MathNEXUS Archive problem to his middle school students: Put nine horses into four rectangular pens so that each pen contains an odd number of horses.
Student L.P.'s response: "Place 2 horses in each of the 4 pens, then you place a quarter horse in each one. A quarter horse is a real horse (used in sprintin)! So technically each pen has 3 horses in it, but the 3rd one in each one was worth only 1/4 of a horse....12 horses with the value of 9."
You have to admit, her solution is quite clever!
Also, if you want to consider the full commentary underlying this problem, consider:
Even Horses Can Become Odd.
NOTE: This problem is from the MathNEXUS Problem Archive (dated January 1, 2006). Thanks S.D. for using the Archive...and I suggest others do so as well. And if your students have creative solutions (or humorous), please share them with me for posting.