Three people enjoy
a meal at a Thai restaurant.
The waiter brings the bill for £30 so each person pays £10.
Later the chef realises that the bill should have only been £25 so she sends the
waiter back to the table with £5.
The waiter wasn't very good at Maths and couldn't figure out how to divide the
£5 so he gave each person a £1 and kept £2 for himself.
So....the three
people have paid £9 each for the meal.
9x3=27
The waiter kept £2
27+2 = £29
What happened to the other pound?
Does this make sense?


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"I think they are very good - some of the 'numeracy' starters were a little dry but you seem to have improved them recently. Thanks for taking the time to put these together and making them free. You've earnt your gold star!" Chris, Exeter
"Good Grief! That had me going (despite being a 30 year old maths graduate!) The waiter's £2 came out of the £27 paid by the three diners. They did pay £27 (3 x £9) and £25 went to the kitchen and £2 to an unscrupulous waiter. Thanks for making me think though!" Anne, Blackburn, Lancashire
"The £27 they paid is the £25 for the meal and the £2 the waiter kept." 9yma3, Northcliffe School
"Excellent. Thank you very much for a fabulous set of starters. I use the 'weekenders' if the daily ones are not quite what I want. Brilliant and much appreciated." *Nikki Jordan, Braunton School, Devon
"£30 shared equally between three is £10 each. Class 8A (Miss Yuen), St Philomena's School, Carshalton
"Right Stuart Don, Aberdeenshire
"Man thats hard that'll keep me thinking but if they all payed 10 came back with 5, £1 for every one = £23 + £2 = 25 help me!" Joss Dutton, Class 9T3, National Comprehensive School
"The £30 is still there!" Faizah, Newcastle
"Here's the real sum; Katie n Shaz n Cyan n Jess n Jess !, Menzies High School
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Keywords: Starter
| Money
| Problem Solving
| Puzzles
| Arithmetic
Tuesday, June 20, 2006
Wednesday, May 23, 2007
Friday, June 08, 2007
Tuesday, June 19, 2007
£25 shared equally between three is £8.33333......(recurring).
(£8.3333...) X 3 + £5 = £10 X 3
So the pound is still there!"
Tuesday, June 19, 2007
The £30 is spead out like this
Restaurant:- £25
Waitor:- £2
Customers:- £3
so 25 + 2 + 3 = £30 so the pound is still there
That Waitor is "NAE NICE""
Tuesday, June 19, 2007
Wednesday, October 17, 2007
Monday, October 22, 2007
£25 for Bill !
£3 for People !
£2 for Waiter ! SOOOOOOOO......
£25 + £3 + £2 = £30 so the pound hasn't gone anywhere."
Friday, December 14, 2007
Good, achieved the results I required
Satisfactory
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.
This starter has scored a mean of 3.7 out of 5 based on 60 votes.
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