QR Challenge: Mental Maths Challenge
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. add 7, 23 and 5= | 35
|
2. multiply 5 by 4= | 20
| 3. write 2 tenths as a decimal number= | 0.2
| 4. how many meters in 2km?= | 3000
| 5. what is half of 13? | 6.5
| 6. multiply 5 by 11 and then subtract 7= | 48
| 7. what is the product of 7 and 50= | 350
| 8. what time is it ten minutes before twenty to one?= | half past 12 or 12:30
| 9. divide 60 by 5= | 12
| 10. half of a number is 45 what is the number?= | 90
| 11. what is the remainder when 18 is divided by 5?= | 3
| 12. What is the number half way between 500 and 800? | 650
| 13. add together 456 and 321= | 777
| 14. 871 subtract 458= | 413
| 15. 34 x 45 = | 1530 |
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=add_7,_23_and_5=
Question 1 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=multiply_5_by_4=
Question 2 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=write_2_tenths_as_a_decimal_number=
Question 3 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=how_many_meters_in_2km?=
Question 4 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_is_half_of_13?
Question 5 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=multiply_5_by_11_and_then_subtract_7=
Question 6 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_is_the_product_of_7_and_50=
Question 7 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_time_is_it_ten_minutes_before_twenty_to_one?=
Question 8 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=divide_60_by_5=
Question 9 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=half_of_a_number_is_45_what_is_the_number?=
Question 10 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=what_is_the_remainder_when_18_is_divided_by_5?=
Question 11 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_number_half_way_between_500_and_800?
Question 12 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=add_together_456_and_321=
Question 13 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=871_subtract_458=
Question 14 (of 15)
Mental Maths Challenge: QR Challenge
https://www.classtools.net/QR/decode.php?text=34_x_45_=
Question 15 (of 15)
