The Problem with Numbers
I first heard this math riddle when I was still in my teens. Instead of my job blog post for today, I decided to ask for your help in solving this puzzle.
Since the following story is not a joke but a math question, let me start with “Three women go to lunch” instead of “Three men go into a bar.”
I will start over.
Three women go to lunch. After eating, the women get the tab. Rounding the total up to $30.00 to include the tip, each of the three women pays $10.00.
The waitress collects the $30.00 and walks away.
Before the three women leave, the manager informs the waitress that the restaurant has overcharged the women $5.00. The manager gives the waitress $5.00 in $1.00 bills.
On the way the table where the three women are sitting, the waitress pockets $2.00 and gives each woman $1.00.
The three women leave the restaurant. Each of the three woman has paid $9.00 for lunch for a total of $27.00. The waitress pocketed $2.00. The sum of what the three women paid plus the money the waitress pocketed is $29.00.
Yet the three women first gave the waitress $30.00.
Where did the extra dollar go?
Image: Tom Brown/Flickr