January 23, 2010 at 3:58 pm

Brain Teaser – Determine the code to open the briefcase

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Doug had forgotten the 5 digit code to his briefcase. However, he did remember five clues:

  1. The fifth number plus the third number equals fourteen;
  2. The fourth number is one more than the second number;
  3. The first number is one less than twice the second number;
  4. The second number plus the third number equals ten; and
  5. The sum of all five numbers is 30.

What were the five numbers and in what order?

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6 Comments

  1. JGM says:
    September 28, 2012 at 2:06 pm

    32836 also works

    Reply
  2. Dustin says:
    January 29, 2010 at 2:26 pm

    7 4 6 5 8

    5 unknowns, 5 equations

    Reply
  3. Heinz Rosen says:
    January 28, 2010 at 6:59 pm

    7,4,6,5,8.
    Elementary Algebra. Actually, even simpler than that.

    Reply
  4. Jose de la Torre says:
    January 25, 2010 at 3:09 pm

    74658

    Reply
  5. Tesh says:
    January 24, 2010 at 9:39 am

    7, 4, 6, 5, 8

    Reply

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