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Math Help - Maths

  1. #1
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    Maths

    Hi i am doing an aptitude test and the book that im practicing off has a question written exactly like this?

    From the digits 0, 1, 2, ..., 9 write the largest possible number using four of them. Underneath write the smallest possible four-digit number that can be made with what is left. (You can only use a digit once.) subtract the second number from the first. Your answer is:............

    Im wondering if the ... is suppose to be a number you can pick from your choice?
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  2. #2
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    Re: Maths

    All good peoples i got it!!
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  3. #3
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    Re: Maths

    its 8850.
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  4. #4
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    Re: Maths

    Quote Originally Posted by Spixol123 View Post
    its 8850.
    I think it's 9876 - 1023 = 8853.
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  5. #5
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    Re: Maths

    9876-0123= 9753
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  6. #6
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    Re: Maths

    Quote Originally Posted by Spixol123 View Post
    Underneath write the smallest possible four-digit number that can be made with what is left.
    Quote Originally Posted by MatthiasChampagne View Post
    9876-0123= 9753
    123 is not a four-digit number.
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  7. #7
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    Re: Maths

    Quote Originally Posted by emakarov View Post
    123 is not a four-digit number.
    In a computer's memory 01 is not the same as 1.
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  8. #8
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    Re: Maths

    Quote Originally Posted by MatthiasChampagne View Post
    In a computer's memory 01 is not the same as 1.
    I doubt they are referring to the binary system
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  9. #9
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    Re: Maths

    Quote Originally Posted by Krahl View Post
    I doubt they are referring to the binary system
    then how about 9876-0.123=9875.877
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