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QR Challenge: Shine maths code breaker

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

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. question I divide it by 3, then add 6. I end up with 16 What was the number I thought of? answer 30
2. question 2 I add 2, then multiply it by 5. I end up with 40 What was the number I thought of? answer 6
3. question 3 I multiply it by 5, then subtract 6. I end up with 39. What was the number I thought of? answer 9
4. question 4 I think of a number, times it by 10, add 41 and my answer is 401. What was my number?answer 36
5. My answer is 60. What was my number? answer 7
6. question 6 I think of a number. I subtract 25 and add 2. I then multiply by 2. My answer is 154, what was my number? answer 100
7. question 7 I think of a number. I add 50, multiply by 3 and subtract 25. My answer is 275. What was my number? answer 50
8. question 8 I think of a number, I multiply by itself, subtract 44, add 10 and my answer is 66. What was the number? answer 10
9. question 9 I think of a number, I divide by 4, add 10 and then double it. My answer is 44. what was the number? answer 48
10. question 10 I am thinking of a number. If I multiply my number by 2 and add 2 the answer is 34 answer 16

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_I_divide_it_by_3,_then_add_6._I_end_up_with_16_What_was_the_number_I_thought_of?

Question 1 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_2_I_add_2,_then_multiply_it_by_5._I_end_up_with_40_What_was_the_number_I_thought_of?

Question 2 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_3_I_multiply_it_by_5,_then_subtract_6._I_end_up_with_39._What_was_the_number_I_thought_of?

Question 3 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_4_I_think_of_a_number,_times_it_by_10,_add_41_and_my_answer_is_401.__What_was_my_number?

Question 4 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=My_answer_is_60.__What_was_my_number?

Question 5 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_6_I_think_of_a_number.__I_subtract_25_and_add_2.__I_then_multiply_by_2.__My_answer_is_154,_what_was_my_number?

Question 6 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_7_I_think_of_a_number.__I_add_50,_multiply_by_3_and_subtract_25.__My_answer_is_275.__What_was_my_number?

Question 7 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_8_I_think_of_a_number,_I_multiply_by_itself,_subtract_44,_add_10_and_my_answer_is_66.___What_was_the_number?

Question 8 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_9_I_think_of_a_number,_I_divide_by_4,_add_10_and_then_double_it.__My_answer_is_44.__what_was_the_number?

Question 9 (of 10)

 



Shine maths code breaker: QR Challenge

https://www.classtools.net/QR/decode.php?text=question_10_I_am_thinking_of_a_number._If_I_multiply_my_number_by_2_and_add_2_the_answer_is_34

Question 10 (of 10)