QR Challenge: Number System
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
- Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
- Bring these devices into the lesson.
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.
| | 3. 2. Give the rules in Addition binary | 1+1=10
| 4.
| | 5. 3. 1010 + 1111? | 11001
| 6.
| | 7. 4. 101111 + 111000? | 1100111
| 8.
| | 9. 5. 1000111111 + 1110111111? | 198
| 10.
| | 11. 6. 11111111100 + 11100011011? | 1234
| 12.
| | 13. 7. Give the rules in Subraction Binary. | 0-1= borrow 1
| 14.
| | 15. 8. 100010110 - 1111010=? | 10011100
| 16.
| | 17. 9. 101101 - 100111=? | 110
| 18.
| | 19. 10. 1110110 - 1010111=? | 11111
| 20.
| | 21. 11. 1000101 - 101100=? | 11001
| 22.
| | 23. 12. 1010110 - 101010=? | 101100
| 24.
| | 25. 13. 1's Complement Method 110011- 11101=? | 10110
| 26.
| | 27. 14. 1's Complement Method 11011 - 1011=? | 10000
| 28.
| | 29. 15. 1's Complement Method 1101101 - 1110010=? | 00101
| 30.
| | 31. 16. 1's Complement Method 11011101 - 11110000=? | 0010011
| 32.
| | 33. 17. 2's Complement Method 1101101 - 0001110=? | 0000101
| 34.
| | 35. 18. 2's Complement Method 1111001 - 1011100=? | 0011101
| 36.
| | 37. 19. 2's Complement Method 100000 - 111111=? | 011111
| 38.
| | 39. 20. 2's Complement Method 110101010 - 111100001=? | 00110111 |
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=1._What_are_the_four_Arithmetic_Binary_System
Question 1 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 2 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=2._Give_the_rules_in_Addition_binary
Question 3 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 4 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=3._1010_+_1111?
Question 5 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 6 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=4._101111_+_111000?
Question 7 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 8 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=5._1000111111_+_1110111111?
Question 9 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 10 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=6._11111111100_+_11100011011?
Question 11 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 12 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=7._Give_the_rules_in_Subraction_Binary.
Question 13 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 14 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=8._100010110_-_1111010=?
Question 15 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 16 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=9._101101_-_100111=?
Question 17 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 18 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=10._1110110_-_1010111=?
Question 19 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 20 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=11._1000101_-_101100=?
Question 21 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 22 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=12._1010110_-_101010=?
Question 23 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 24 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=13._1's_Complement_Method_110011-_11101=?
Question 25 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 26 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=14._1's_Complement_Method__11011_-_1011=?
Question 27 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 28 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=15._1's_Complement_Method__1101101_-_1110010=?
Question 29 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 30 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=16._1's_Complement_Method__11011101_-_11110000=?
Question 31 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 32 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=17._2's_Complement_Method_1101101_-_0001110=?
Question 33 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 34 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=18._2's_Complement_Method_1111001_-_1011100=?
Question 35 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 36 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=19._2's_Complement_Method_100000_-_111111=?
Question 37 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=
Question 38 (of 39)
Number System: QR Challenge
https://www.classtools.net/QR/decode.php?text=20._2's_Complement_Method_110101010_-_111100001=?
Question 39 (of 39)