577 = 11111 Puzzle
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This 577 = 11111 Puzzle asks you to arrange the numbers 5, 7, and 7 to make a shape. Then, you are tasked to make an identical shape using the numbers 1, 1, 1, 1, and 1.

This creative puzzle was created by Erich Friedman and shared in Puzzle Box, Volume 1.
Have you noticed my typo in the instructions? I didn’t realize it until I started writing this post. Don’t worry. I have fixed it in the downloadable file below.
This puzzle turned out to not be quite as tricky as the Ducks and Snakes puzzle by Erich Friedman.
Free Download of 577 = 11111 Puzzle
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577 = 11111 Puzzle (PDF)
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577 = 11111 Puzzle (Editable Publisher File ZIP)
1231 downloads – 152.81 KB
Want more puzzles? Check out my puzzles page!
Puzzle Solutions
Puzzle solutions are available on a password-protected solution page. I do not openly post the puzzle answer keys because one of my goals as a resource creator is to craft learning experiences for students that are non-google-able. I want teachers to be able to use these puzzles in their classrooms without the solutions being found easily on the Internet.
Please email me at sarah@mathequalslove.net for the password to the answer key database featuring all of my printable puzzles and math worksheets. I frequently have students emailing me for the answer key, so please specify in your email what school you teach at and what subjects you teach. If you do not provide these details, I will not be able to send you the password.
Not a teacher? Go ahead and send me an email as well. Just let me know what you are using the puzzles for. I am continually in awe of how many people are using these puzzles with scouting groups, with senior adults battling dementia, or as fun activities in their workplace. Just give me enough details so I know you are not a student looking for answers to the puzzle that was assigned as their homework!