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Outdoor & Recreation
Camping
Maths problem to solve while sitting around the campfire?
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<blockquote data-quote="BigWave" data-source="post: 578042" data-attributes="member: 6786"><p>Thanks Rob.</p><p></p><p>This one's a bit different..........</p><p></p><p>John and Alex become friends with Jane and they want to know when her birthday is. </p><p>Jane gives them both a list of 10 possible dates:</p><p></p><p>May 15 16 19</p><p>June 17 18 </p><p>July 14 16 </p><p>August 14 15 17 </p><p></p><p>Jane then privately tells John the month of her birthday, and separately tells Alex the day of her birthday.</p><p>John says: I don't know when Jane's birthday is, but I know that Alex doesn't know either".</p><p>Alex says: "At first I didn't know when Jane's birthday is, but after you said that, now I know".</p><p>John then says: "After you said that, now I also know when Jane's birthday is".</p><p></p><p><strong>What is Jane's birthday?</strong></p><p></p><p>If you get the answer correct, you'll be asked to prove it wasn't a guess by providing your logic.</p></blockquote><p></p>
[QUOTE="BigWave, post: 578042, member: 6786"] Thanks Rob. This one's a bit different.......... John and Alex become friends with Jane and they want to know when her birthday is. Jane gives them both a list of 10 possible dates: May 15 16 19 June 17 18 July 14 16 August 14 15 17 Jane then privately tells John the month of her birthday, and separately tells Alex the day of her birthday. John says: I don't know when Jane's birthday is, but I know that Alex doesn't know either". Alex says: "At first I didn't know when Jane's birthday is, but after you said that, now I know". John then says: "After you said that, now I also know when Jane's birthday is". [b]What is Jane's birthday?[/b] If you get the answer correct, you'll be asked to prove it wasn't a guess by providing your logic. [/QUOTE]
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Outdoor & Recreation
Camping
Maths problem to solve while sitting around the campfire?
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