QR Challenge: World War 2 - Code Breaking

Created using the ClassTools QR Treasure Hunt Generator

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.

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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!

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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.

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Questions / Answers (teacher reference)

Question	Answer
1. 9²	81
2. 3x20+4x3	72
3. 5²x4+10%of 50	105
4. 10%of240	24
5. 8x11	88
6. 6²x10	360
7. √81	9
8. 10x5x7	550
9. 4²	16
10. 90%of70	63
11. 9²	81
12. 6+5x4	36
13. 1.2x100	120
14. 15%of300	45
15. √64	8
16. The first prime number	2
17. 1.5x10	15
18. √36	6
19. √36-5	1
20. 5²-15	10
21. 12x12x2-44	240
22. ½ of 2³	4
23. √9	3
24. √49	7
25. 5x6+3x4	42
26. √36-1	5

 

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