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Can You Solve This Maths Question? by Nobody: 2:39pm On Apr 13, 2015 |
Albert and Bernard have just become friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of possible dates. May 15 May 16 May 19 June 17 June 18 July 14 July 16. August 14 August 15 August 17 Cheryl then tells Albert and Bernard separately the month and day of her birthday respectively.( To clarify....Cheryl tells Albert the month in which her birthday falls, and she tells Bernard the day’s number. In other words, Albert is told either May, June, July or August. Bernard is told either 14, 15, 16, 17, 18 or 19.) Albert : I don't know when Cheryl's birthday is, but I know Bernard doesn't know too. Bernard: At first I do not know when Cheryl's birthday is , but I know now. Albert: Then I also know when Cheryl's birthday is. So....when is Cheryl celebrating her birthday? (Question was originally asked in an exam for ten year olds in the Singaporean education system). Original source:https://www.facebook.com/kennethjianwenz/photos/a.173663129479243.1073741827.167504136761809/385751114937109/?type=1 |
Re: Can You Solve This Maths Question? by ManUtdholic: 2:49pm On Apr 13, 2015 |
On 18 |
Re: Can You Solve This Maths Question? by ARareGem(f): 4:56pm On Apr 13, 2015 |
I don't no where to start from. |
Re: Can You Solve This Maths Question? by Clefcentfelix(m): 5:02pm On Apr 13, 2015 |
July 16, should I explain or still leave it for others to figure out? |
Re: Can You Solve This Maths Question? by karfe(m): 5:09pm On Apr 13, 2015 |
June 18 |
Re: Can You Solve This Maths Question? by Feraz(m): 12:23am On Apr 14, 2015 |
This is interesting. . . . . July 16 |
Re: Can You Solve This Maths Question? by ihedinobi2: 12:36am On Apr 14, 2015 |
July 16. |
Re: Can You Solve This Maths Question? by ephemm(m): 1:46am On Apr 15, 2015 |
July 16 I also saw the explanation on BBC news and I really don't get the mathematician's basis for eliminating May and June, so all those above me forming nerd pls explain! |
Re: Can You Solve This Maths Question? by Clefcentfelix(m): 6:10am On Apr 15, 2015 |
Lol, no Nerd Forming bro, the statement Albert made- "I know Bernard doesn't know too" simply means 'the month cheryl told me is different from the months that have the unique, unduplicated days 18, 19 so I'm sure Bernard does not know because no matter the day Bernard is told there will be more than one instance of that day' I hope you get it? |
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