Funny Math

My son was working in a group on word problems with his teacher at school the other day. One section was on ones, tens, and hundreds in every day situations. The question was: Is your grandfather: 5, 50, or 500? After a quick second of confusion, my son blurted out:

"Mrs. Smith... my DAD's 50!"

I'm still cleaning up the wine on the wall after I spit it out laughing.