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QR Challenge: Inverse Level 3

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. I am thinking of a number, I multiplied it by 2 and added 3. I end up with 19. What is my number? 8
2. ? x 7 = 42 6
3. 45÷?=9 5
4. I think of a number, I subtract 5 and then multiply by 4. I end up with 20. What is my number? 10
5. I think of a number, I add 8 and then multiply by 6. I end with 72. What is my number? 4
6. ?x6=48 8
7. ?÷9=8 72
8. I think of a number, I multiply by 3 and minus 4. I end with 50. What is my number? 18

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=I_am_thinking_of_a_number,_I_multiplied_it_by_2_and_added_3._I_end_up_with_19._What_is_my_number?

Question 1 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=?_x_7_=_42

Question 2 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=45÷?=9

Question 3 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=I_think_of_a_number,_I_subtract_5_and_then_multiply_by_4._I_end_up_with_20._What_is_my_number?

Question 4 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=I_think_of_a_number,_I_add_8_and_then_multiply_by_6._I_end_with_72._What_is_my_number?

Question 5 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=?x6=48

Question 6 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=?÷9=8

Question 7 (of 8)

 


Inverse Level 3: QR Challenge

https://www.classtools.net/QR/decode.php?text=I_think_of_a_number,_I_multiply_by_3_and_minus_4._I_end_with_50._What_is_my_number?

Question 8 (of 8)