QR Challenge: Multiplying by 2dg numbers

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. 678x34	23052
2. 891x40	35640
3. 3333x65	216645
4. 154x95	14630
5. 78x14	1092
6. 66x50	3300
7. Robert saves £5.40 every week for 8 weeks. How much has he saved after 8 weeks?	£43.20
8. 9000x8	72000
9. 6701x90	603090
10. MCCxLXIV	76800
11. LXXIXsquared	6241
12. 73cubed	389017
13. 51squared	2601
14. 87cubed	658503
15. 4789x25	119725
16. Rachel runs 4.67km in 30 minutes. How far does she run in 4 hours?	37.36km
17. 784x32	25088
18. 54.35x9	489.15
19. 123.99x4	495.96
20. 54.56x65	3546.40

 

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