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Solve this maths puzzle

  • 23-04-2016 7:42am
    #1
    Closed Accounts Posts: 1,433 ✭✭✭The Raptor


    Can anyone help me solve this maths puzzle?

    I keep getting 104 but most people are getting 105.


«1

Comments

  • Registered Users, Registered Users 2 Posts: 5,369 ✭✭✭Quandary


    105 is correct. You are probably missing the subtraction in line 3 and adding instead.


  • Registered Users, Registered Users 2 Posts: 275 ✭✭retweet


    105 is right. On the third line, you're probably adding the goat as 99kg, it's 100kg.


  • Registered Users, Registered Users 2 Posts: 683 ✭✭✭gumbo1


    Cat = 4kg
    duck = 1kg
    sheep = 100kg

    105 is correct!


  • Closed Accounts Posts: 1,433 ✭✭✭The Raptor


    Quandary wrote: »
    105 is correct. You are probably missing the subtraction in line 3 and adding instead.

    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.


  • Closed Accounts Posts: 19,889 ✭✭✭✭The Moldy Gowl


    That's pretty easy


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  • Registered Users, Registered Users 2 Posts: 683 ✭✭✭gumbo1


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    There's your mistake. Your taking that the duck and sheep is = 100kg, it's not. It's 101kg!


  • Registered Users, Registered Users 2 Posts: 5,369 ✭✭✭Quandary


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    You are thinking about it incorrectly.

    Sheep - Duck = 99kg
    100kg - 1kg. = 99kg

    Therefore Sheep is 100kg


  • Closed Accounts Posts: 1,730 ✭✭✭Sheep Lover


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    Er no.

    Sheep = 100kg
    Sheep - duck = 99 kg
    Sheep + duck = 101 kg


  • Closed Accounts Posts: 2,679 ✭✭✭hidinginthebush


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    ಠ_ಠ

    Sheep - duck = 99
    Duck = 1

    Move the duck to the other side and we get:

    Sheep = 99 + duck
    Sheep = 99 + 1
    Sheep = 100


  • Registered Users, Registered Users 2 Posts: 2,562 ✭✭✭Sono


    Jaysus I thought this might be a teaser on a sat morning, left disappointed!


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  • Registered Users, Registered Users 2 Posts: 2,342 ✭✭✭fatknacker


    Only geniuses can solve


  • Registered Users, Registered Users 2 Posts: 2,497 ✭✭✭ezra_pound


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    What you're missing that -1+1=0
    Your logic assumes that -1+1=1


  • Closed Accounts Posts: 19,889 ✭✭✭✭The Moldy Gowl


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    No.
    The sheep minus duck is 100 - 1 which is 99. Take the duck out of that equation and the sheep is 100.
    It already tells us a cat and duck is 5 and we worked out the cat is 4

    So it's 105


  • Registered Users, Registered Users 2 Posts: 6,285 ✭✭✭bonzodog2


    Definitely 105


  • Registered Users, Registered Users 2 Posts: 339 ✭✭duffman85


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    Sheep - duck =99
    So sheep=99+duck=100


  • Closed Accounts Posts: 19,889 ✭✭✭✭The Moldy Gowl


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.


    If you were to add the duck back on, you would have no ducks.


  • Registered Users, Registered Users 2 Posts: 17,709 ✭✭✭✭Mr. CooL ICE


    This man is the authority on everything sheep related.
    Er no.

    Sheep = 100kg
    Sheep - duck = 99 kg
    Sheep + duck = 101 kg


  • Registered Users, Registered Users 2 Posts: 5,369 ✭✭✭Quandary


    retweet wrote: »
    105 is right. On the third line, you're probably adding the goat as 99kg, it's 100kg.

    That ain't no goat brah.


  • Registered Users, Registered Users 2 Posts: 25,775 ✭✭✭✭kfallon


    Let me guess OP, you didn't do too well at Algebra in school?


  • Closed Accounts Posts: 1,433 ✭✭✭The Raptor


    kfallon wrote: »
    Let me guess OP, you didn't do too well at Algebra in school?

    Did you?


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  • Closed Accounts Posts: 18,299 ✭✭✭✭The Backwards Man


    The answer is a power washer.


    For all the shìte they're going to leave on the street.


  • Closed Accounts Posts: 19,889 ✭✭✭✭The Moldy Gowl


    The Raptor wrote: »
    Did you?

    Probably better than you.
    Unless you are 12


  • Registered Users, Registered Users 2 Posts: 1,809 ✭✭✭Stokolan


    Its definitely 105

    105. Is mixed meat special in schezwan sauce in my local Chinese take away.


  • Closed Accounts Posts: 1,433 ✭✭✭The Raptor


    Quandary wrote: »
    You are thinking about it incorrectly.

    Sheep - Duck = 99kg
    100kg - 1kg. = 99kg

    Therefore Sheep is 100kg

    Yes, you're right.


  • Closed Accounts Posts: 32,688 ✭✭✭✭ytpe2r5bxkn0c1


    The Raptor wrote: »
    Yes, you're right.

    D'ooh, do you think?

    Of course he's right.


  • Registered Users, Registered Users 2 Posts: 5,455 ✭✭✭maudgonner


    Anybody else got "Old MacDonald had a farm" stuck in their heads now?

    No? Just me? Grand so...


  • Posts: 0 CMod ✭✭✭✭ Meilani Thoughtless Van


    fatknacker wrote: »
    Only geniuses can solve

    bbc thinks you can't


  • Registered Users, Registered Users 2 Posts: 7,014 ✭✭✭Allinall


    You can't subtract a duck from a sheep, unless there was a duck there in the first place.

    It's a baaad equation, with quacked logic.


  • Closed Accounts Posts: 12,045 ✭✭✭✭gramar


    The Raptor wrote: »
    I'm not missing it.

    The sheep minus duck equals 99kg. But if you were to add the duck back on it would be 100 kg. So 100kg for the sheep plus duck. Minus the duck equals 99kg for the sheep.

    You'd have a shuck.


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  • Closed Accounts Posts: 18,299 ✭✭✭✭The Backwards Man


    I'll remember this thread the next time there's talk of a teacher's strike.


  • Registered Users, Registered Users 2 Posts: 9,286 ✭✭✭seligehgit


    105


  • Registered Users, Registered Users 2 Posts: 6,808 ✭✭✭Badly Drunk Boy


    This man is the authority on everything sheep related.
    But can we also have confirmation from Duck Lover?


  • Closed Accounts Posts: 5,162 ✭✭✭MadDog76


    retweet wrote: »
    105 is right. On the third line, you're probably adding the goat as 99kg, it's 100kg.

    Goat? :confused:


  • Closed Accounts Posts: 5,162 ✭✭✭MadDog76


    Duck = 1kg
    Cat = 4kg
    Sheep = 100kg


    4kg + 4kg + 4kg = 12kg

    1kg + 4kg = 5kg

    100kg - 1kg = 99kg

    100kg + 4kg + 1kg = 105kg


    I just asked my 9 year old son to have a look at this ......... and he also came up 105kg as the answer.


  • Moderators, Category Moderators, Arts Moderators, Entertainment Moderators Posts: 9,047 CMod ✭✭✭✭CabanSail


    It's actually 105.25kg

    That cat in the final line is definitely pregnant (+305 gms) but the sheep had a crap (-55 gms) but the duck is unchanged. So it makes 105.25kg


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  • Registered Users, Registered Users 2 Posts: 12,046 ✭✭✭✭L'prof


    Sono wrote: »
    Jaysus I thought this might be a teaser on a sat morning, left disappointed!

    I got notepad out and everything only to realise I should have just done it in my head :(

    The best way that I can explain that it's not 104kg is by showing that the Sheep and the Cat are 104kg. We all agree that the duck is 1kg so the 3 combined are 105kg.


  • Closed Accounts Posts: 31,152 ✭✭✭✭KERSPLAT!


    Anyone else get 18!? :confused:


  • Closed Accounts Posts: 5,162 ✭✭✭MadDog76


    retweet wrote: »
    105 is right. On the third line, you're probably adding the goat as 99kg, it's 100kg.
    KERSPLAT! wrote: »
    Anyone else get 18!? :confused:

    I think the goat weighs 87kg so you must have taken the goat's weight away from the total weight of the sheep, cat & duck to come up with 18kg?


  • Registered Users, Registered Users 2 Posts: 20,592 ✭✭✭✭kneemos


    Sheep are hideous creatures,even on a plate.
    They survive solely on the tastiness and cuteness of their kids.

    Deduct 45.


  • Closed Accounts Posts: 1,730 ✭✭✭Sheep Lover


    kneemos wrote: »
    Sheep are hideous creatures,even on a plate.
    They survive solely on the tastiness and cuteness of their kids.

    Deduct 45.

    **** you


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  • Closed Accounts Posts: 12,452 ✭✭✭✭The_Valeyard


    Surely the cat would have killed the duck?


  • Registered Users, Registered Users 2 Posts: 5,369 ✭✭✭Quandary


    Surely the cat would have killed the duck?

    We have no way of knowing that. It could be an exceptionally large duck.


  • Registered Users, Registered Users 2 Posts: 20,592 ✭✭✭✭kneemos


    Quandary wrote: »
    We have no way of knowing that. It could be an exceptionally large duck.



    Or a cat cat.


  • Registered Users, Registered Users 2 Posts: 6,547 ✭✭✭Agricola


    It's rare for me to pwn a maths puzzle on the internet. Chuffed.
    Might apply to NASA now.


  • Registered Users, Registered Users 2 Posts: 5,455 ✭✭✭maudgonner


    Would you rather fight a sheep-sized duck or a hundred duck-sized sheep?

    (The cat would just be a spectator, silently judging you)


  • Registered Users, Registered Users 2 Posts: 25,775 ✭✭✭✭kfallon


    The Raptor wrote: »
    Did you?

    Yes! :D


  • Registered Users, Registered Users 2 Posts: 25,775 ✭✭✭✭kfallon


    KERSPLAT! wrote: »
    Anyone else get 18!? :confused:

    I see you hit the Paddy last night then :pac:


  • Closed Accounts Posts: 5,162 ✭✭✭MadDog76


    kneemos wrote: »
    Sheep are hideous creatures,even on a plate.
    They survive solely on the tastiness and cuteness of their kids.

    Deduct 45.

    Again with the goat!!! :mad:

    Goats have kids .......... sheep have lamb!!!


  • Registered Users, Registered Users 2 Posts: 5,455 ✭✭✭maudgonner


    kneemos wrote: »
    Sheep are hideous creatures,even on a plate.
    They survive solely on the tastiness and cuteness of their kids.

    Deduct 45.

    Eh baby sheep = lamb. Baby goat = kid.

    Why are goats constantly sneaking their way into this thread?


  • Registered Users, Registered Users 2 Posts: 1,603 ✭✭✭coffeepls


    109. Sorted. Those cats just looked the same. Didn't fool me.


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