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    A monday morning puzzle

    3 guys go to London for the weekend and book into a cheap hotel-the receptionist tells them the room will cost 30 pounds,so they each pay a tenner each and go to their room.

    Ten minutes later,the receptionist realises she has overcharged them and that the actual room cost is £25,so she calls the porter,gives him five pound coins and tells him to take the refund up to the room and give them it.

    On the way upstairs,the porter pockets 2 quid for himself and refunds the 3 men one pound each.

    So this means they have each paid £9 for the room-3x9=27,plus the £2 the porter took=£29.

    so where is the other pound?

    13 Comments

    Banned

    doesnt work that way

    they ended up paying £27 for the room (£25 for the hotel & £2 for the porter)

    Banned

    basically, you went wrong here:-

    So this means they have each paid £9 for the room-3x9=27,MINUS the £2 the porter took=£25.

    There is no missing pound.

    Original Poster

    csiman

    basically, you went wrong here:-So this means they have each paid £9 for … basically, you went wrong here:-So this means they have each paid £9 for the room-3x9=27,MINUS the £2 the porter took=£25.



    err,no.because there was originally 30 quid so if its MINUS the 2 the porter took,then theres a fiver missing is there not? they originally forked over £30-if they get a one pound refund each they have paid £9 each for the room=27 PLUS the 2 the porter has in his pocket=29.

    It's a paradox.........it all depends on how you do the maths to get the total amount.

    .............but there is still no missing pound.

    Original Poster

    Syzable

    It's a paradox.........it all depends on how you do the maths to get the … It's a paradox.........it all depends on how you do the maths to get the total amount..............but there is still no missing pound.



    ok sy-you too clever-you are correct-its a simple linguistic trick whereby you mix a multiplication and an addition and create a paradox(Im not that clever btw-thats the explanation in the book)

    so it is all about how you explain it-the receptionist has 25,the guys have 3,the porter has 2=30

    I love these........there are quite a few of them around. Hurt your brain early on a monday morning though. lol

    BODMAS.

    Worst puzzle ever.

    barky

    err,no.because there was originally 30 quid so if its MINUS the 2 the … err,no.because there was originally 30 quid so if its MINUS the 2 the porter took,then theres a fiver missing is there not? they originally forked over £30-if they get a one pound refund each they have paid £9 each for the room=27 PLUS the 2 the porter has in his pocket=29.



    It right Barky.

    They pay £30.

    Receptionist gives porter £5.

    They each get £1 back.

    They have therefore paid £27 between them for a £25 room.

    This leaves £2 difference for the porter to pocket.

    It's the "3 x £9 = £27" bit which makes it a riddle.

    Yes, granted this is correct, but they have already received the £1 refund at this point.

    So they have paid 3 lots of £9 to make £27, but have had £1 refund each.

    £27 + £3 = £30 originally paid.
    (3 x £9) + (3 x £1) = £30.

    Love the way people argue about this puzzle as if there really is/ isn't a missing pound
    Edited by: "greg_68" 4th Oct 2010

    Banned

    My brain hurts
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