PREMIUM LOGIN

ClassTools Premium membership gives access to all templates, no advertisements, personal branding and other benefits!

Username:    
Password:    
Submit Cancel

 
Not a member? JOIN NOW!  

QR Challenge: Solving with Substitution

Created using the ClassTools QR Treasure Hunt Generator

Print

Create a New QuizEdit this quiz View a Sample Quiz
Detailed Case Study Search the Archive Feedback

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. y = -4x + 16, -3x + 8y = 23(3,4)
2. -3x + 6y = -24, y = 7x + 22(-4,-6)
3. y = 5x + 5, y = x + 5(0,5)
4. y = 4x + 22,y = -4x - 18(-5,2)
5. x - 3y = -12, 4x + 6y = -12(-6,2)
6. y = -4, -3x - 6y = 15(3,-4)
7. 2x + 4y = -10, 7x + 8y = -23(-1,-2)
8. -3x + .5y = -3.5, y = 6x + 11no solution
9. y = -5x, 21x - 7y = 28(0.5,-2.5)
10. 2x + 4y = -32, 6x - 2y = -12(-4,-6)
11. 6y = -12x - 18, 2x + y = 9no soltuion
12. 9x + 3y = 15, -2x - y = 6(11,-28)
13. x - 5y = -40, 1.2x - 3y = -19.5(7.5,9.5)
14. y = 4x + 17, -5x + y = 12(5,37)
15. -11x = -y - 25, y - 4 = 11xno solution
16. 5x + 2y = 8, 4y - 4x = 30(-1,6.5)
17. 0.5x + 0.25y = 2,2.4x - 0.25y = 3.8(2,4)
18. 3x + 2y = 7, 4x + 3y = 12(-3,8)
19. y = 15 + 0.08x, y = 35(250,35)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_-4x_+_16,_-3x_+_8y_=_23

Question 1 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=-3x_+_6y_=_-24,_y_=_7x_+_22

Question 2 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_5x_+_5,_y_=_x_+_5

Question 3 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_4x_+_22,y_=_-4x_-_18

Question 4 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=x_-_3y_=_-12,_4x_+_6y_=_-12

Question 5 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_-4,_-3x_-_6y_=_15

Question 6 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=2x_+_4y_=_-10,_7x_+_8y_=_-23

Question 7 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=-3x_+_.5y_=_-3.5,_y_=_6x_+_11

Question 8 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_-5x,_21x_-_7y_=_28

Question 9 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=2x_+_4y_=_-32,_6x_-_2y_=_-12

Question 10 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=6y_=_-12x_-_18,_2x_+_y_=_9

Question 11 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=9x_+_3y_=_15,_-2x_-_y_=_6

Question 12 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=x_-_5y_=_-40,_1.2x_-_3y_=_-19.5

Question 13 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_4x_+_17,_-5x_+_y_=_12

Question 14 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=-11x_=_-y_-_25,_y_-_4_=_11x

Question 15 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=5x_+_2y_=_8,_4y_-_4x_=_30

Question 16 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.5x_+_0.25y_=_2,2.4x_-_0.25y_=_3.8

Question 17 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=3x_+_2y_=_7,_4x_+_3y_=_12

Question 18 (of 19)

 


Solving with Substitution: QR Challenge

https://www.classtools.net/QR/decode.php?text=y_=_15_+_0.08x,_y_=_35

Question 19 (of 19)