Brain Teaser – Determine the code to open the briefcase

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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