QR Challenge: Mental Maths
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.
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. multiply 7 by 2= | 14
|
2. what is 7 less than 100= | 93
| 3. half of a number is 45 what is the number= | 90
| 4. round 261 to the nearest 100= | 300
| 5. How many minutes are there in three quarters of an hour= | 45minutes
| 6. Divide 60 by 5= | 12
| 7. Double 8.4= | 16.8
| 8. How many meteres are there in 3km?= | 3000
| 9. Add nine, six and five= | 20
| 10. What is the name of the shape with 6 sides?= | hexagon
| 11. What is the remainder when 18 is divided by 5= | 3
| 12. I spend 75p - how much change do i get from a 2 pound coin?= | 1.25
| 13. What number is half way between 300 and 600= | 450
| 14. What number multiplied by 10 makes 180? | 18
| 15. Multiply 4 by 6 and then add 9= | 33
| 16. what is one third of 33?= | 11
| 17. Write me 3 multiples of 8= | 8 16 24 32
| 18. what is 4.5 multiplies by 100= | 450 |
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=multiply_7_by_2=
Question 1 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_is_7_less_than_100=
Question 2 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=half_of_a_number_is_45_what_is_the_number=
Question 3 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=round_261_to_the_nearest_100=
Question 4 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=How_many_minutes_are_there_in_three_quarters_of_an_hour=
Question 5 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=Divide_60_by_5=
Question 6 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=Double_8.4=
Question 7 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=How_many_meteres_are_there_in_3km?=
Question 8 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=Add_nine,_six_and_five=
Question 9 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_name_of_the_shape_with_6_sides?=
Question 10 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_remainder_when_18_is_divided_by_5=
Question 11 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=I_spend_75p_-_how_much_change_do_i_get_from_a_2_pound_coin?=
Question 12 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_number_is_half_way_between_300_and_600=
Question 13 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_number_multiplied_by_10_makes_180?
Question 14 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=Multiply_4_by_6_and_then_add_9=
Question 15 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_is_one_third_of_33?=
Question 16 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=Write_me_3_multiples_of_8=
Question 17 (of 18)
Mental Maths: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_is_4.5_multiplies_by_100=
Question 18 (of 18)
