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Thread: Any maths wizards in the house????

  
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    Ffoeg's Avatar
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    Any maths wizards in the house????

    A colleagues asked if I could help her 10yr old daughter with some maths homework the other day and i'ts got me bamboozled to say the least.

    Her husband (civil engineer), our accouts dept, and numerous other maths brains are all floundering with this one. So I'd thought it'd be a good thing to try on the AS collective consciousness. here goes....

    Quote Originally Posted by question
    There are eight doors in a row. Behind each door is a number. Each numbers is less than 20. No two numbers are the same, and the numbers on the doors are in order.

    Three of the numbers are prime numbers.
    Two of the numbers are square numbers.
    Two of the numbers are multiples of 5.
    Five of the numbers are even.
    Three is a factor of two of the numbers
    There are a pair of consecutive numbers, and four consecutive numbers on the doors
    The sum of the numbers is 93

    What are the numbers behind the doors?
    Answers please

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    CAN'T WORK IT OUT! :?

    Don't understand how there can be 5 even numbers if the numbers on the doors are in order????

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    2 4 10 11 15 16 17 18

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    I did it i did it 1st


    OR NOT

    thanks MTM
    http://lufcguernsey.brinkster.net/Car/timmahsig.jpg
    MatG "Dont worry about it...piece of cake mate." Says the Man with a car in how many bits??? :shock:

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    Quote Originally Posted by TIMMAH
    2 4 10 11 15 16 17 18

    I did it i did it 1st


    OR NOT

    thanks MTM
    Sorry mate!

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    Top marks go to Max the Mole.

    With a special commendation to Timmah - very good for a 4yr old lol.

    How long did this take ya to solve (tell the truth now)???

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    Quote Originally Posted by Max_The_mole
    2 4 10 11 15 16 17 18
    how many of these are prime numbers????

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    Quote Originally Posted by billp22
    Quote Originally Posted by Max_The_mole
    2 4 10 11 15 16 17 18
    how many of these are prime numbers????
    3 of them 2, 11 & 17

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    Quote Originally Posted by Ffoeg

    How long did this take ya to solve (tell the truth now)???
    bout 10 mins,

    TIP OF THE DAY:- write ou the numbers from 1-20
    http://lufcguernsey.brinkster.net/Car/timmahsig.jpg
    MatG "Dont worry about it...piece of cake mate." Says the Man with a car in how many bits??? :shock:

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