Math Riddle Teaser Thing

Posted by amnesia
Ok here's a math question. I'll ask it in parts.
(it's a smart answer)

Three guys were where in a restaurant. They spent 30 pounds on drinks.

They each decided to pay 10 pounds even. So they gave the waiter 10 pounds each. The waiter went to the cashier who decided he wanted to get some loyal customers, and so he gave the waiter 5 pounds back and told him to give it to them as a discount.

On the way to the table, the waiter thought "let me make this even because dividing 5 by 3 is impossible". So he put 2 pounds in his pocket and returned 3.

So each of them had 1 pound back. How much did they end up paying in total?

edit: I'll back back to check up and post the next question.

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[ This Message was edited by: amnesia on 2006-02-24 03:52 ]

Posted by EastCoastStar
well hey spent 30 pounds technically originally, but got 1 back each, so they spent 27 pounds.

Posted by Johnex
Or 9 pounds each :-).

Posted by private
i think 9.33 each or 28 in total

Posted by JK
They all payed 9p each for drinks and 66c to the waiter?

no no they paid 10p each!

Posted by max99
they didnt get 1 bk each

Look got 5 back, waiter added 2 = 7, then took 3, = Ł4

So each = Ł1.33333....

so paid Ł8.66.... each

:S

Posted by blackspot
This is an old trick question. You're just confusing yourselves with the change and the water's share.

There are two sides: the customer and the restaurant -- don't mix them!

Customer side:
3 persons paid 10 pounds each and got 1 pound each back, i.e. they only paid 9 pounds each to the restaurant or a total of 27 pounds, while they have 3 pounds back with them.

(10-1) x 3 = 27

Restaurant side:
Cashier received 30 pounds and returned 5 pounds, i.e. Cashier only have 25 pounds.
Waiter took 2 pounds from the 5 pounds and returned only 3 pounds to the customer.

25 + 2 = 27

All in all, the restaurant have 27 pounds and the customers have 3 pounds.

27 + 3 = 30

Posted by amnesia
what I was going to continue with is the following.

If they paid 10 each, received 1 back each, it means they each spent 9. Total 9 X 3 is 27 agreed?
The last 2 pounds is with the wait right? So where did the last 1 go?

Posted by Glenny
that would be a trick of doubling, if you did this on your table, 1 pound wouldnt just disapear, the resaurant got Ł25, and gave the waiter Ł5, so its still Ł30, they gave the people Ł3 and he had Ł2, its still Ł30, its just a trick

Posted by amnesia
yes it is indeed a trick, hence the post, and I wanted to see people's reactions...