Stvoider Posted September 13, 2011 Share Posted September 13, 2011 Anyone know how to solve this? You see a shirt for £97, you can't afford it so u borrow £50 from your mum and £50 from your dad which equals £100. You buy the shirt and get £3 change so you give your dad £1 and your mum £1 back and you keep the other pound. So now you owe your mum £49 and dad £49, 49+49 =98 + your £1 =99. Where's the missing £1? Link to comment Share on other sites More sharing options...
HeadingNorth Posted September 13, 2011 Share Posted September 13, 2011 There is no missing pound. The addition of the two sums you owe to the pound you still have is nonsensical; but because the riddle is designed to make that nonsensical addition come out at very nearly the correct amount (£100) it fools people into thinking it should make sense. Link to comment Share on other sites More sharing options...
Alcoblog Posted September 13, 2011 Share Posted September 13, 2011 Erm ... did you drop it in the shirt shop? Link to comment Share on other sites More sharing options...
Stvoider Posted September 13, 2011 Author Share Posted September 13, 2011 There is no missing pound. The addition of the two sums you owe to the pound you still have is nonsensical; but because the riddle is designed to make that nonsensical addition come out at very nearly the correct amount (£100) it fools people into thinking it should make sense. Indeed. But it all makes sense until the end Link to comment Share on other sites More sharing options...
Stvoider Posted September 13, 2011 Author Share Posted September 13, 2011 Erm ... did you drop it in the shirt shop? No. But I think I'm starting to find out where my spare money goes. Link to comment Share on other sites More sharing options...
danot Posted September 13, 2011 Share Posted September 13, 2011 Anyone know how to solve this? You see a shirt for £97, you can't afford it so u borrow £50 from your mum and £50 from your dad which equals £100. You buy the shirt and get £3 change so you give your dad £1 and your mum £1 back and you keep the other pound. So now you owe your mum £49 and dad £49, 49+49 =98 + your £1 =99. Where's the missing £1? In your pocket. Link to comment Share on other sites More sharing options...
flamingjimmy Posted September 13, 2011 Share Posted September 13, 2011 Anyone know how to solve this? You see a shirt for £97, you can't afford it so u borrow £50 from your mum and £50 from your dad which equals £100. You buy the shirt and get £3 change so you give your dad £1 and your mum £1 back and you keep the other pound. So now you owe your mum £49 and dad £49, 49+49 =98 + your £1 =99. Where's the missing £1? There is no missing pound. You've already paid back 1 pound each to your parents so the total debt should only add up to 98, and it does. You owe your mum £49 and your dad £49 and you have 1 pound + a shirt. The '+ your £1' bit is the part in there to confuse you. EDIT: Dammit HN! Ninja'd! Link to comment Share on other sites More sharing options...
boyfriday Posted September 13, 2011 Share Posted September 13, 2011 You should have paid them £1.50, not a £1 each Link to comment Share on other sites More sharing options...
Stvoider Posted September 13, 2011 Author Share Posted September 13, 2011 You should have paid them £1.50, not a £1 each I know, but I wanted a pasty. Link to comment Share on other sites More sharing options...
HeadingNorth Posted September 13, 2011 Share Posted September 13, 2011 Indeed. But it all makes sense until the end That's why it successfully confuses people. Everything up until the last addition is perfectly valid, and therefore you're pre-conditioned to assume that the last addition will also be valid. It isn't. There are two valid ways of adding sums together; the £97 you paid for the shirt, the pound you gave to each parent, and the pound you still have: 97+1+1+1=100. Or, the two lots of £49 you still owe, plus the two pounds you already paid back: 49+1+49+1=100. Adding together two sums you still owe to a sum you still have left gives a meaningless total, but one which - thanks to the design of the riddle - is close enough to 100 to make you think it should actually be 100. In fact it could be absolutely anything. Write out the riddle with a shirt price of £83 and borrowing two fifties, and see what you get. Link to comment Share on other sites More sharing options...
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