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QR Challenge: Number Sense

Created using the ClassTools QR Treasure Hunt Generator

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Detailed Case Study Search the Archive Feedback

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

Questions / Answers (teacher reference)

Question

Answer

1. 1)Find GCF of 21, 35, 497
2. 2)Find GCF of 10, 15, 205
3. 3)Find GCF of 32, 4816
4. 4) Find the LCM of 14, 2142
5. 5) Find the LCM of 4, 5, 1020
6. 6) Find the LCM of 3, 5, 7105
7. 7) Prime Factorization 900 3x3x2x2x5x5
8. 8)Prime Factorization of 375 5x5x5x3
9. 9) Prime Factorization of 1,4482x2x2x181
10. 10) 90 is divisible by what numbers?2, 3,5,6,9,10
11. 11) 104 is divisible by what numbers?2,4
12. 12) 305 is divisible by what numbers? 5, 10
13. 13) Find the GCF & LCM of 8, 14 (2 answers2, 56
14. 14) Find the GCF & LCM 3, 9, 15 (2 answers)3, 45
15. 15) Find the GCF & LCM 9, 12, 18 (2 answers)3, 36
16. 16) (3-1.2) + 1.43.2
17. 17) 20 + 1.3) - 912.3
18. 18) 15 - (2.2 + 4.4)8.4

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q1/18:

1)Find GCF of 21, 35, 49&choe=UTF-8

Question 1 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q2/18:

2)Find GCF of 10, 15, 20&choe=UTF-8

Question 2 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q3/18:

3)Find GCF of 32, 48&choe=UTF-8

Question 3 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q4/18:

4) Find the LCM of 14, 21&choe=UTF-8

Question 4 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q5/18:

5) Find the LCM of 4, 5, 10&choe=UTF-8

Question 5 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q6/18:

6) Find the LCM of 3, 5, 7&choe=UTF-8

Question 6 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q7/18:

7) Prime Factorization 900&choe=UTF-8

Question 7 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q8/18:

8)Prime Factorization of 375 &choe=UTF-8

Question 8 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q9/18:

9) Prime Factorization of 1,448&choe=UTF-8

Question 9 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q10/18:

10) 90 is divisible by what numbers?&choe=UTF-8

Question 10 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q11/18:

11) 104 is divisible by what numbers?&choe=UTF-8

Question 11 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q12/18:

12) 305 is divisible by what numbers?&choe=UTF-8

Question 12 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q13/18:

13) Find the GCF & LCM of 8, 14 (2 answers&choe=UTF-8

Question 13 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q14/18:

14) Find the GCF & LCM 3, 9, 15 (2 answers)&choe=UTF-8

Question 14 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q15/18:

15) Find the GCF & LCM 9, 12, 18 (2 answers)&choe=UTF-8

Question 15 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q16/18:

16) (3-1.2) + 1.4&choe=UTF-8

Question 16 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q17/18:

17) 20 + 1.3) - 9&choe=UTF-8

Question 17 (of 18)

 


Number Sense: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number Sense
Q18/18:

18) 15 - (2.2 + 4.4)&choe=UTF-8

Question 18 (of 18)