1. Figure this out:

Three men in a hotel call room service and order two large pizzas. the delivery boy brings them up with a bill for exactly &#036;30. Each man gives him a &#036;10, and he leaves.

When the delivery boy hands the &#036;30 to the cashier, he is told that a mistake has been made. The bill was not &#036;30, but in fact &#036;25. The cashier give the delivery boy five &#036;1 bills and instructs him to give it back to the men who ordered the pizza.

On his way back to their room, the delivery boy has a thought ... these men didn&#39;t tip him. His figures that since there is no way to split &#036;5 evenly three ways he will keep &#036;2 as a tip and give them back &#036;3.

He knocks on the door and one of the men answers. The boy explains about the mix-up with the bill, and hands the men &#036;3, then departs with his &#036;2 tip in his pocket.

Now the fun begins:

&#036;30 - &#036;25 = &#036;5. Correct? &#036;5-&#036;3 = &#036;2. Correct?

So, what&#39;s the problem?
All is well, right?

Each man originally gave &#036;10 each.
They each got &#036;1 in change.
That means they paid &#036;9 each, and multiplied by three is &#036;27.
The delivery boy kept &#036;2 for a tip.

&#036;27 + &#036;2 = &#036;29

Where is the other dollar?

2. I got it:

the last line is misleading...you must look at what was paid in: 9*3=27, and what was kept, 25 ffor the pizza and 2 tip...this adds up to the 27

btw: hidden text, so as to not spoil it

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