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Can You Crack The Safe?? A New Book Series

12/2/2020

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To crack the safe, you need to logically deduce the combinations for the two locks below.

Lock One--Easy

Picture

Lock Two--More Challenging

Picture
If you enjoyed these (or if you need help learning to solve them) then our new book series Crack the Safe is now available.  This new book contains 30 unique puzzles and includes full, detailed solutions.
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    Brian and Melanie Fulton both earned doctoral degrees in mathematics at Virginia Tech.  They formerly taught math at the university level, and now run a hobby farm while accuracy-checking collegiate mathematics texts.  They homeschool their four children, frequently employing the aid of chicken, dairy goat, cat, and dog tutors. ​

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  • The Math Profs
  • Books
  • Blog
  • Grids for Kids
  • Crack the Safe Series
  • Reviews
  • Authors