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QR Challenge: Number System

Created using the ClassTools QR Treasure Hunt Generator

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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. What are the four Arithmetic Binary System Addition, Subtraction, Multiplication and Division
2. 2. Give the rules in Addition binary 1+1=10
3. 3. 1010 + 1111? 11001
4. 4. 101111 + 111000? 1100111
5. 5. 1000111111 + 1110111111? 198
6. 6. 11111111100 + 11100011011? 1234
7. 7. Give the rules in Subraction Binary. 0-1= borrow 1
8. 8. 100010110 - 1111010=? 10011100
9. 9. 101101 - 100111=? 110
10. 10. 1110110 - 1010111=? 11111
11. 11. 1000101 - 101100=? 11001
12. 12. 1010110 - 101010=? 101100
13. 13. 1's Complement Method 110011- 11101=? 10110
14. 14. 1's Complement Method 11011 - 1011=? 10000
15. 15. 1's Complement Method 1101101 - 1110010=? 00101
16. 16. 1's Complement Method 11011101 - 11110000=? 0010011
17. 17. 2's Complement Method 1101101 - 0001110=? 0000101
18. 18. 2's Complement Method 1111001 - 1011100=? 0011101
19. 19. 2's Complement Method 100000 - 111111=? 011111
20. 20. 2's Complement Method 110101010 - 111100001=? 00110111

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q1/20:

1. What are the four Arithmetic Binary System&choe=UTF-8

Question 1 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q2/20:

2. Give the rules in Addition binary &choe=UTF-8

Question 2 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q3/20:

3. 1010 + 1111? &choe=UTF-8

Question 3 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q4/20:

4. 101111 + 111000? &choe=UTF-8

Question 4 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q5/20:

5. 1000111111 + 1110111111? &choe=UTF-8

Question 5 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q6/20:

6. 11111111100 + 11100011011? &choe=UTF-8

Question 6 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q7/20:

7. Give the rules in Subraction Binary. &choe=UTF-8

Question 7 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q8/20:

8. 100010110 - 1111010=? &choe=UTF-8

Question 8 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q9/20:

9. 101101 - 100111=? &choe=UTF-8

Question 9 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q10/20:

10. 1110110 - 1010111=? &choe=UTF-8

Question 10 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q11/20:

11. 1000101 - 101100=? &choe=UTF-8

Question 11 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q12/20:

12. 1010110 - 101010=? &choe=UTF-8

Question 12 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q13/20:

13. 1's Complement Method 110011- 11101=? &choe=UTF-8

Question 13 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q14/20:

14. 1's Complement Method 11011 - 1011=? &choe=UTF-8

Question 14 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q15/20:

15. 1's Complement Method 1101101 - 1110010=? &choe=UTF-8

Question 15 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q16/20:

16. 1's Complement Method 11011101 - 11110000=? &choe=UTF-8

Question 16 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q17/20:

17. 2's Complement Method 1101101 - 0001110=? &choe=UTF-8

Question 17 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q18/20:

18. 2's Complement Method 1111001 - 1011100=? &choe=UTF-8

Question 18 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q19/20:

19. 2's Complement Method 100000 - 111111=? &choe=UTF-8

Question 19 (of 20)

 


Number System: QR Challenge

https://www.classtools.net/QR/decode.php?text=Number System
Q20/20:

20. 2's Complement Method 110101010 - 111100001=? &choe=UTF-8

Question 20 (of 20)