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Math Question puzzle

Discussion in 'Chit Chat' started by trendlover, Feb 19, 2009.

1. trendlover

3 girls in a hotel room order room service pizza. The room service boy brings the pizza, and it costs \$30.00
Each girl gives \$10.00 3x10=\$30.00

The room service boy takes the money to the cashier. Cashier say it was a mistake, and the bill is only \$25.00. Cashier gives back 5 \$1 dollar bills to the room service boy to take back to the girls. \$30.00 - \$25.00 = \$5.00

Going back to the room the room service boy decide to keep \$2.00 for himself because he did not get a tip. That leave \$3.00 to give to 3 girls in the room.

So he does that. But if each girl gave \$10.00, then got back \$1.00 each from the room service boy, that means each girl paid \$9.00 for the pizza bill.
If \$9.00 x 3 = \$27.00 and the room service boy kept \$2.00 for the tip... \$27.00 + \$2.00 = \$29.00 what happened to the other \$1.00? Remember the bill was \$30.00.

2. TGregg

I solved this riddle when I was in the 6th grade.

Ok, tell me.

4. EricP

The misleading part is in the last sentence:

<i>If \$9.00 x 3 = \$27.00 and the room service boy kept \$2.00 for the tip... \$27.00 + \$2.00 = \$29.00 what happened to the other \$1.00? Remember the bill was \$30.00.</i>

The correct way to look at it would be:

<i>If \$9.00 x 3 = \$27.00 and the room service boy kept \$2.00 for the tip... \$27.00 <b>-</b> \$2.00 = <b>\$25.00</b> which is was the billed amount.</i>

Or, put another way:

Where did the \$30 go? The correct charge was \$25, the room service tip was \$2 and the girls got \$3 back.

30 = 25 + 2 + 3

5. trendlover

Misleading in the language. Ok Ericp, thank you.

6. TGregg

It did take me days to solve though. At least two. I finally figured it out in the middle of the night while lying in bed.

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