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I’m hoping that this Color Rectangle Puzzle will delight many puzzle solvers for years to come. One of the very first puzzles I ever put out on my first ever puzzle table back in 2017 was Donald Knuth’s Color Square Puzzle.
This puzzle is very similar, but instead of forming a square you are forming a rectangle.
Arrange the twelve colored pieces into the rectangle below so that no pieces of the same color touch each other, not even at corners. You can rotate pieces and flip them over, but you can not allow any of the pieces to overlap.
In 2018, I ran across the Color Rectangle puzzle. I typed it up, but in the craziness of teaching while pregnant followed by teaching while parenting a young baby followed by teaching while in a pandemic I never actually ended up printing out the puzzle.
I finally got around to printing it this year during our back-to-school prep days when I was printing a few other new resources for my classroom.
The Color Rectangle Puzzle was created by Donald Knuth, and it was featured in one of the puzzle books that got me addicted to using puzzles in my classroom with students: Puzzle Box, Volume 3.
The printable file will actually contain enough pieces for TWO puzzles.
Free Download of Color Rectangle Puzzle
Previously, there was a major error in the downloadable file I shared. It has now been corrected. I apologize for any confusion/frustration this caused!
Color Rectangle Puzzle – 8.5 x 11 (PDF – ZIP) (1844 downloads)
Want more puzzles? Check out my entire collection of free printable puzzles!
Puzzle Solutions
I intentionally do not make answers to the printable math puzzles I share on my blog available online because I strive to provide learning experiences for my students that are non-google-able. I would like other teachers to be able to use these puzzles in their classrooms as well without the solutions being easily found on the Internet.
However, I do recognize that us teachers are busy people and sometimes need to quickly reference an answer key to see if a student has solved a puzzle correctly or to see if they have interpreted the instructions properly.
If you are a teacher who is using these puzzles in your classroom, please send me an email at sarah@mathequalslove.net with information about what you teach and where you teach. I will be happy to forward an answer key to you.
More Pentominoes Puzzles
- Pentominoes Pi Symbol Puzzle
- Pentominoes Heart Puzzle
- Printable One Inch Pentominoes
- Reindeer Pentominoes Puzzle
- Pentominoes Christmas Tree Puzzle
- Pentominoes Pig Puzzle
- Pentominoes Jack-o’-lantern Halloween Puzzle
- Elephant Pentominoes Puzzle
- Terrier Pentominoes Puzzle
- Penguin Pentominoes Puzzle
- 13 Free Printable Pentominoes Puzzle Challenges
- Star Pentominoes Puzzle
- Color Rectangle Puzzle
- Pentasquares Puzzle
- Three Immovable Pentablocks
Tawna
Friday 22nd of October 2021
We are really struggling with this one.
Peter
Monday 22nd of November 2021
My students struggled too! Great challenge before Thanksgiving!
Beth
Wednesday 1st of September 2021
Can you show us the answer? We are having a very hard time figuring it out and I'd like to give my kids a hint.
Sarah Carter
Wednesday 1st of September 2021
There's actually a mistake in the pieces - one of the squares is missing. I had to take down the file once I found out, but I haven't had a chance to fix it yet with all the back to school craziness. Hopefully I will get it fixed this weekend. I sent you an email with more details!
Jesse Kalinsky
Thursday 26th of August 2021
Are the pieces supposed to fit within the rectangle and on the grid? I printed out the 8.5x11 one and it didn't seem to fit.
Sarah Carter
Monday 30th of August 2021
Hi Jesse. They are supposed to fit, but there was an error when I made the file. I have removed the download, and I am in the process of correcting it. Sorry for the confusion. I will update the post when I have the new files available.
Kelly Holzmeyer
Thursday 26th of August 2021
Hi my students are doing the color rectangle in class today. They are coming up with an empty box when solved. Do you know if there is an error on the pieces?
Sarah Carter
Monday 30th of August 2021
Hi Kelly! I'm so sorry about this. Someone else also emailed me to let me know that the rectangle that is four boxes long is actually supposed to be five boxes long. I apologize for the frustration that this must have caused your students. I have taken the download down temporarily so I can fix it. I will re-upload it with the correct pieces soon. Sorry, sorry, sorry!
Mary
Wednesday 25th of August 2021
Do the pieces fit for either puzzle? I don't see puzzle pieces for the letter size version. Only the 11x17 version.
Sarah Carter
Monday 30th of August 2021
Hi Mary! I actually have had to take the pieces down because there was a mistake in them. I will repost the corrected version and make sure that I have puzzle pieces for both sizes clearly labeled when I do so. Sorry for the confusion!