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QR Challenge: Mental maths

Created using the ClassTools QR Treasure Hunt Generator

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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. 1. Multiply 6 by 848
2. 2. What is half of 9.6?4.8
3. 3. Look at this number sequence 42 - z = 17. What is the value of z?25
4. 4. How many grammes are there in three and a half kilogrammes?3500g
5. 5. Add together 51, 28 and 36115
6. 6. Work out the difference between 440 and 730290
7. 7. What number is half-way between 24 and 50?37
8. 8. Multiply 60 by 804800
9. 9. Sue buys a ticket for one pound thirty pence and pays with a ten pound note, how much change does she get?£8.70
10. 10.How many minutes are there in four and a half hours?270 minutes
11. 11.A rectangle has two sides of 3 cm and 2 of 8 cm. What is the perimeter of the rectangle?22cm
12. 12. What is 550 cm to the nearest metre?6m
13. 13. What is twice seven hundred and forty?1480
14. 14. A train is due to arrive at 2.15. It is forty minutes late. When will it arrive?2.55
15. 15. What is half of eight point four?4.2
16. 16. What number is half-way between 34 and 60?47

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=1._Multiply_6_by_8

Question 1 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=2._What_is_half_of_9.6?

Question 2 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=3._Look_at_this_number_sequence_42_-_z_=_17._What_is_the_value_of_z?

Question 3 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=4._How_many_grammes_are_there_in_three_and_a_half_kilogrammes?

Question 4 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=5._Add_together_51,_28_and_36

Question 5 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=6._Work_out_the_difference_between_440_and_730

Question 6 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=7._What_number_is_half-way_between_24_and_50?

Question 7 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=8._Multiply_60_by_80

Question 8 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=9._Sue_buys_a_ticket_for_one_pound_thirty_pence_and_pays_with_a_ten_pound_note,_how_much_change_does_she_get?

Question 9 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.How_many_minutes_are_there_in_four_and_a_half_hours?

Question 10 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=11.A_rectangle_has_two_sides_of_3_cm_and_2_of_8_cm._What_is_the_perimeter_of_the_rectangle?

Question 11 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=12._What_is_550_cm_to_the_nearest_metre?

Question 12 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=13._What_is_twice_seven_hundred_and_forty?

Question 13 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=14._A_train_is_due_to_arrive_at_2.15._It_is_forty_minutes_late._When_will_it_arrive?

Question 14 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=15._What_is_half_of_eight_point_four?

Question 15 (of 16)

 


Mental maths: QR Challenge

https://www.classtools.net/QR/decode.php?text=16._What_number_is_half-way_between_34_and_60?

Question 16 (of 16)