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Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
Math Problem Solving with Rigor: Unlock the Code
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What others say

"This trick with this task is not to let the students reach total frustration. If they use logic it is not quite so intimidating. We create a hint sheet in class as we work through the task. One of my favorites!"
star
Rebecca F.

Description

Nadia Geddit wanted to get into her building, but she forgot the code to the lock. However, she did remember some clues about the code.

These are 5 clues about the code:

1) The sum of the fifth digit and the third digit is 14.

2) The fourth digit is one more than the second digit.

3) The first digit is one less than twice the second digit.

4) The sum of the second and third digit is 10.

5) The sum of all five digits is 30.

What 5 digits must Nadia press to make the lock open?

How would your students solve this problem? This problems puts students to the test as they figure out how to solve it using a variety of strategies. Comes complete with problem for students to work on, detailed approaches to teaching and solving the problem in a variety ways, answer key, as well as a "Do It Yourself" sheet where students can make up their own "Unlock the Code" Problem and share with one another.
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Math Problem Solving with Rigor: Unlock the Code

Rated 5 out of 5, based on 7 reviews
5.0 (7 ratings)
SamizdatMath
837 Followers
$2.95

Highlights

Digital downloads
Grades icon
Grades
5th - 8th
Pages
10
Answer Key
Included
Teaching Duration
50 minutes

What others say

"This trick with this task is not to let the students reach total frustration. If they use logic it is not quite so intimidating. We create a hint sheet in class as we work through the task. One of my favorites!"
star
Rebecca F.

Description

Nadia Geddit wanted to get into her building, but she forgot the code to the lock. However, she did remember some clues about the code.

These are 5 clues about the code:

1) The sum of the fifth digit and the third digit is 14.

2) The fourth digit is one more than the second digit.

3) The first digit is one less than twice the second digit.

4) The sum of the second and third digit is 10.

5) The sum of all five digits is 30.

What 5 digits must Nadia press to make the lock open?

How would your students solve this problem? This problems puts students to the test as they figure out how to solve it using a variety of strategies. Comes complete with problem for students to work on, detailed approaches to teaching and solving the problem in a variety ways, answer key, as well as a "Do It Yourself" sheet where students can make up their own "Unlock the Code" Problem and share with one another.
Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Reviews

5.0
Rated 5 out of 5, based on 7 reviews
7
ratings
All verified TPT purchases
Used many times and each experience was different
Rated 5 out of 5
August 6, 2025
Met expectations
Great value
This trick with this task is not to let the students reach total frustration. If they use logic it is not quite so intimidating. We create a hint sheet in class as we work through the task. One of my favorites!
Rebecca Flora
(TPT Seller)
294 reviews • Washington
Grades taught: 6th
Rated 0 out of 5
August 3, 2018
haven't tried yet
Kristina M.
120 reviews
Rated 5 out of 5
December 5, 2017
Fabulous! Love this activity and my students did too!
Lori L.
485 reviews
Rated 5 out of 5
July 10, 2017
Thanks really engaging for students.
Gabbrielle P.
384 reviews
Rated 5 out of 5
February 7, 2017
Thanks!
CLASSROOM MAGIC
(TPT Seller)
850 reviews
Rated 5 out of 5
October 23, 2016
I love all your resources, and this is no exception. Thanks so much!
Coach's Corner
(TPT Seller)
643 reviews
Rated 5 out of 5
August 9, 2016
My students love a good challenge and problem solving. Excited to use this resource.
ERICA Sperry
(TPT Seller)
32 reviews
Rated 5 out of 5
November 1, 2015
wonderful activity
MathPlusMore
(TPT Seller)
769 reviews

Questions & Answers

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