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?


Starter of The Day Menu | Transum Software
"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
"They have not paid £27 for meal the bill was £25. yes they paid £27 but inculiding £2 which waiter kept for hiself. Baran Ulutas, london
"We found this starter extremly good and the children really enjoyed it and quoted " This was the best starter." Miss Andrew and Miss Dengure, Nether Hall Learning Campus
"The Pound is still there because: Elder Class, Petersfield
"The pound has not gone any where because if the people paid 10 pounds each,the total was 30 pounds. Holly Adams, Thistely Hough
"10x3=30 right and the waiter gives back 1 pound to each person so thats 9x3 which is 27 plus the 2 pounds the waiter took which is £29. but it's really 30-3=27 and 27-2 so the pound hasn't gone anywhere it's to do with the times tables i think." MWS student, Home
"So what are we looking for? the 30 pounds spent or should we look for the 25 given for the meal: Eddy, Huntcliff school
"they added the 2 twice in both 9x3 and the 27+2. They should have written 27+3 because they paid for the waiters *tip* Farnborough hill Hampshire , year 8 set 1
"£25 + £3 + £2 =£30 Mrs O'Hagan's 2nd yr class, Holyrood RC Sec , Glasgow
"Charlotte says no it doesn't make sense, but we liked it anyway. More like this please." year 8 top set, Brockington College
"The one pound is still there because the waiter =£2 Simran Kaur Kainth, Holyrood RC Secondary School
"I think he kept the pound for him self!" Ghaya Rashid, Northbury Junior School
"I really enjoy using your starter of the day with my students. The missing pound one was a very hard nut to crack." Godwin Amarikwa-Obi, St. Mary's COE School, Hendon, London
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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
so £25+£2+£3=£30"
Tuesday, June 03, 2008
Tuesday, June 10, 2008
£30 - £1x3 = £27.00
£27.00 - £2.00 = £25.00
So the restaurant gets
£25 + £2.00 (waiter)
Guests get £3.00
Totals £30.00
We thought this was a good starter because it got us thinking!!!"
Wednesday, June 18, 2008
But the waiter came back with 5 pounds meaning they only paid 9 pounds.
this is the sum.
Waiter=2 pounds,
People=3 pounds,
Bill= 25 pounds.
25 add 3 add 2 =30 pounds"
Wednesday, June 18, 2008
Wednesday, June 18, 2008
each pay £9 (9x3=27) and the waiter keeps £2 so the sum should realy be £27 - £2 = 25 which is what the restaurant got!!!
real good staters though
Thanks"
Thursday, June 19, 2008
Original cost=£30
Returned £3
Waiter kept £2
therefore they paid £27, instead of £25-the evil waiter stole £2.
THEIF!!!!!
woooooooooooooohoooooooooooooo"
Thursday, June 19, 2008
THE WAITER SHOULD BE FIRED!! "
Thursday, June 19, 2008
Thursday, June 19, 2008
people =£3
bill =£25
so they all add up to £30.there we have it there was no one pound missing after all!"
Thursday, June 19, 2008
Thursday, June 19, 2008
Friday, June 20, 2008
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 3.8 out of 5 based on 79 votes.
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