QR Challenge: Mental maths 2003a
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 8 by 8 | 64
|
2. How many nines are there in 63? | 7
| 3. What number should you ad to -5 to get the answer 6? | 11
| 4. I'm thinking of a number I call it n. I square my number and add 3. Write an expression to show the result | n2+3
| 5. What number is 3 cubed? | 27
| 6. A bat flies at an average speed of thiry kilometres per hour. At this speed, how far would it fly in ten minutes? | 5km/h
| 7. Subtract nought point three from seven | 6.7
| 8. Write down two numbers which are multiples of 8 | 8, 16, 24...
| 9. A drink costs 49p. How much will 7 drinks cost? | £3.43
| 10. I buy two cakes costing £3.55 eac. How much change will I get from £10? | £2.90
| 11. A sequence has a rule: multiply by 2 and add1. What are the first 3 terms of this sequence? | 3,5,7
| 12. A fair 6 sided spinner has 4 even numbers and 2 odd numbers. What is the probability of getting an even number? | 2/3
| 13. Twenty five percent of a number is 8. What is the number? | 32
| 14. What is three-fifths of £30? | £18
| 15. What is the volume of a cuboid measuring 4cm by 3cm by 5cm | 60cm3
| 16. Evalute the expression 5k+1 when k=4 | 21 |
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=Multiply_8_by_8
Question 1 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=How_many_nines_are_there_in_63?
Question 2 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_number_should_you_ad__to_-5_to_get_the_answer_6?
Question 3 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=I'm_thinking_of_a_number_I_call_it_n._I_square_my_number_and_add_3._Write_an_expression_to_show_the_result
Question 4 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_number_is_3_cubed?
Question 5 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_bat_flies_at_an_average_speed_of_thiry_kilometres_per_hour._At_this_speed,_how_far_would_it_fly_in_ten_minutes?
Question 6 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=Subtract_nought_point_three_from_seven
Question 7 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=Write_down_two_numbers_which_are_multiples_of_8
Question 8 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_drink_costs_49p._How_much_will_7_drinks_cost?
Question 9 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=I_buy_two_cakes_costing_£3.55_eac._How_much_change_will_I_get_from_£10?
Question 10 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_sequence_has_a_rule:_multiply_by_2_and_add1._What_are_the_first_3_terms_of_this_sequence?
Question 11 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_fair_6_sided_spinner_has_4_even_numbers_and_2_odd_numbers._What_is_the_probability_of_getting_an_even_number?
Question 12 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=Twenty_five_percent_of_a_number_is_8._What_is_the_number?
Question 13 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_three-fifths_of_£30?
Question 14 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_volume_of_a_cuboid_measuring_4cm_by_3cm_by_5cm
Question 15 (of 16)
Mental maths 2003a: QR Challenge
https://www.classtools.net/QR/decode.php?text=Evalute_the_expression_5k+1_when_k=4
Question 16 (of 16)
