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Hidden Equation Puzzle 3

Here’s a third hidden equation puzzle from Erich Friedman. Circle one symbol in each column so that a true equation results reading from left to right.

I love to use these hidden equation puzzles with dry erase pockets in my classroom.

If you don’t have a classroom set of dry erase pockets, you could also use heavy duty sheet protectors. But, I highly recommend investing in a classroom set of the pockets since they are so much more durable.

Hidden Equation Puzzle 3 - Erich Friedman

I found this puzzle in Puzzle Box, Volume 2 which is one of the volumes in my favorite collection of printed puzzles. Erich Friedman has a gigantic collection of free puzzles on his website that are worth taking a look at, as well!

Digital Version of Hidden Equation Puzzle 3

Kathy Henderson has created a digital version of this Hidden Equation Puzzle 3 in Desmos Activity Builder.

Puzzle Solutions

I intentionally do not share solutions to the puzzles I feature on my website because I strive to provide learning experiences for my students that are not 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 with information about what you teach and where you teach. I will be happy to forward an answer key to you.


Friday 13th of August 2021

Never mind, I solved the puzzle shortly after posting my original question. The black circles represent multiplication signs.

Sarah Carter

Sunday 15th of August 2021

Sorry for the confusion!


Friday 13th of August 2021

Are the black circles intended to represent decimal points or multiplication signs?

Amy Bernhard

Wednesday 2nd of June 2021

I absolutely love all your activities! This hidden equations activity is great. It gets the kids really thinking about the math and really shows if the kids conceptually understand equations and math operations in general.