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Int 2 maths question?

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    Hey everyone! Good luck with all your exams! I just finished a Non-Calc paper and got full marks except from one little question I have no idea how to do!

    Evalulate - 16 3/4

    I thought it would be 12 since 16 divided by 4 x 3 = 12 ... but the answer is 8?

    Thanks!
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    What's the question? 3/4 of 16 is 12 but what you have posted isn't really a question it's more a statement.
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    (Original post by roar558)
    What's the question? 3/4 of 16 is 12 but what you have posted isn't really a question it's more a statement.
    The question is

    Evaluate 16 3/4

    ^^^^^^^^^^

    But I am confused as I would think it to be 12 but the answer is 8!

    Thanks!
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    (Original post by itsc0ntagious)
    The question is

    Evaluate 16 3/4

    ^^^^^^^^^^

    But I am confused as I would think it to be 12 but the answer is 8!

    Thanks!
    That doesn't sound like a complete question, the answer to that question would be 16 3/4. Are you sure there isn't anything more to it?
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    (Original post by roar558)
    That doesn't sound like a complete question, the answer to that question would be 16 3/4. Are you sure there isn't anything more to it?
    Nope! If you have the 2006 Non Calc paper handy it's that year!
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    Any chance you could post a photo or scan of the question? There must be something we're missing. I can't see any way to get 8 from that.
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    The answer would be 8 if the question were evaluate 16^{3/4}. Have you wrote or read the question wrong?
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    12
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    (Original post by TheUnbeliever)
    Any chance you could post a photo or scan of the question? There must be something we're missing. I can't see any way to get 8 from that.
    Sure .. sorry the webcam on my laptop reverses things but if you can't make it out, it is Evaluate 16 3/4 and the answer (Q9) is 8


    Thanks
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    (Original post by rosie9391)
    The answer would be 8 if the question were evaluate 16^{3/4}. Have you wrote or read the question wrong?
    Can you please explain why! thank you!
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    For what it's worth, you normally use the caret symbol or two stars to indicate exponentiation: a^b or a**b.
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    (Original post by itsc0ntagious)
    Can you please explain why! thank you!
    a^{\frac{m}{n}} = \sqrt[n]{a^m} = \sqrt[n]{a}^m

    Put the power inside or outside the square root, whichever is easier for evaluation.
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    (Original post by TheUnbeliever)
    a^{\frac{m}{n}} = \sqrt[n]{a^m} = \sqrt[n]{a}^m

    Put the power inside or outside the square root, whichever is easier for evaluation.
    Everybody makes mistakes! Thank you!
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    The answer is 8, as firstly you do 16 ^ 1/4 which is 2, then you cube it which is 8. 16 ^ 3/4 is the same as [16 ^ (1/4)]^3
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    Int 2 is easy. Done it last year while doing standard grade and got an A. You'll be fine.
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    (Original post by Sami')
    Int 2 is easy. Done it last year while doing standard grade and got an A. You'll be fine.
    well done! can i just ask, how does

    2_/18 simplify to 6_/2 ???
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    (Original post by itsc0ntagious)
    well done! can i just ask, how does

    2_/18 simplify to 6_/2 ???
    2\sqrt{18} = 2\sqrt{9}\sqrt{2} = 6\sqrt{2}

    (\sqrt{ab} = \sqrt{a}\sqrt{b})
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    Anyone got todays solutions?

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Updated: May 21, 2012
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