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Math Help - How do I go about calculating these without using a calculator? (Mental Test)

  1. #1
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    How do I go about calculating these without using a calculator? (Mental Test)

    I'm so stuck. I've read lots of books but would like it if a person would help me?
    Thank you...

    How do I go about calculating these without using a calculator? (Mental Test)-prob1.jpgHow do I go about calculating these without using a calculator? (Mental Test)-prob2.jpg
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  2. #2
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    Re: How do I go about calculating these without using a calculator? (Mental Test)

    1/4 of the marks come from the mental test ... OK, one-fourth of what? When you know what, multiply that by 1/4.

    Does that help?
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  3. #3
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    Re: How do I go about calculating these without using a calculator? (Mental Test)

    Suppose the total marks one may get in the exam is 16. How much (at most) one can get for the written paper? How much (at most) can you get for the mental test?
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  4. #4
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    Re: How do I go about calculating these without using a calculator? (Mental Test)

    Let total marks be 100
    then 75 marks written paper
    and 25 marks of course work.

    mental test marks = 75 1/4 = 18.75
    % of 18.75/100 = 1875/10000
    reduce to get in fraction form
    = 75/400
    = 3/16 part
    or
    direct calculations
    1/4 of written = mental marks = 3/4 1/4 = 3/16
    ---
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