In a Row Puzzle
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This In a Row Puzzle challenges students to arrange the digits 1 through 9 in such a way that four statements regarding the sum of various subsets of the row are true.

The numbers 1 and 2 and all the digits between them add up to 9. The numbers 2 and 3 and all the digits between them add up to 19. The numbers 3 and 4 and all the digits between them add up to 45.
Finally, the numbers 4 and 5 and all the digits between them add up to 18.

Often, people ask me where I run across the puzzles I use with my students and share on my blog. Here’s the short answer: One of my hobbies is reading through as many puzzle books as I can get my hands on.
I love checking puzzle books out of the Internet Archive’s free Online Lending Library for this purpose.

I discovered this puzzle in Maximize Your Brainpower: 1000 New Ways to Boost Your Mental Fitness by Philip Carter and Ken Russell. I checked this book out for free from the Internet Archive’s Online Lending Library that I mentioned earlier.
I attached disc magnets to the back of the digits 1 through 9 so that students can move them around as they work to solve the puzzle.
If you had students working in groups at their tables, you wouldn’t need magnets at all. You could even give this as a task on whiteboards with no number cards at all.
Free Download of In a Row Puzzle
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In A Row Puzzle (PDF)
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Want more puzzles like this? I have an entire page of free downloadable puzzles.
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!
Thank you so much for this fun puzzle! I am curious….do you also post the answers? 🙂 I love your site!
You’re very welcome! I don’t post answers here on the site because I don’t want students to be able to google them. Teachers can always email me for an answer key! (mathequalslove@gmail.com)
I would love an answer key to “In a Row”. I’m curious to see if I’m doing it right!
Kelly, from British Columbia, Canada 🙂
Check your email!
Can I get a key to the In a Row Puzzle. I think I have it right…but you never know 🙂
Just sent you an email!
Can I get the answer to in a row?
Just sent you an email!
Can I get a key for In A Row and the 9-10-11-12 Challenge?
Sending you an email, Lindsay!
I would love an answer key to this as well. Thank you!
Sending you an email, Sarah!
I would love a key to in a row
Sending you an email, Amy!
Could I please have a key for In a Row? THANK YOU for sharing these resources!
I just sent you an email Candace!
Could you please share the answer key for IN a Row? Thanks!
Emailed!
Please send the key! And I am
so very thankful for all that you do to inspire!
Emailed you!
I would love the answer key for In A Row. Thank you for making math so much more fun to teach!
Emailed you!
This is a great activity! Thank you so much for sharing. My I get a key as well?
Emailed you!
Hi Sarah!
Do you mind sending me the answers to this in a row puzzle?
Thank you!
Just sent you an email, Jackie!
May I get a key as well please
Just emailed you, Tara!
May I have an answer key to this one and to 5 arrows puzzle. Thank you. Love all of this
Just sent you an email, Jim!
Thank you for sharing the puzzle 🙂
Can I have the answers please?!
Sent you an email, Megan!
Thank you for sharing your puzzles.
What a great way to develop grit and practice collaboration!
Thank you 🙂
I would love an answer key to this as well!
Sent you an email, Molly!