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Find the four-digit number described by these three clues.
1) The first digit is one-third of the third digit.
2) The fourth digit is twice the second digit.
3) The first and third digits add up to twice the sum of the second and fourth digits.

  • math -

    The first digit has to be 1,2,or 3, it can't be anything else.

    posibilities:
    1x3x
    2x6x
    3x9x
    The second digit can be 1,2,3,4
    x2x4
    x3x6
    x4x8
    The final clue lets you determine which digits it is.

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