MATH

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HOW MANY SEVEN-DIGIT NUMBERS LESS THAN 1,048,000 CAN BE MADE USING THE DIGITS 0,1,4,6,7,8,AND 9? THINK: MAKE A LIST OF POSSIBLE WAYS TO REPRESENT YOUR SEVEN-DIGIT NUMBERS

  • MATH -

    since the number must be < 1 048 000
    the number must be like
    104ABCD where A can only be 6 or 7

    so the ABCD part can be filled in
    2x3x2x1 or 12 ways

    I will leave it up to you to list those 12 numbers.
    Go about it systematically
    e.g.
    1046789
    1046798
    1046879
    1046897 etc

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