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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. How many faces does a cube have?6
2. How many lines of symmetry does a regular hexagon have?6
3. What is the area of a square of side 6cm?36
4. A lesson lasts for 50 minutes. It starts at 13.35, what time will it finish?14.25
5. What is the sum of 63 and 72?135
6. What is the difference beween 51 and 17?34
7. What is the product of 9 and 6?54
8. Divide 63 by 97
9. The probability of a train arriving early is 0.03. What is the probability of it not arriving early?0.97
10. I throw an ordinary dice numbered 1 to 6. What is the probability of getting an odd number?0.5
11. What is the mean of 7, 3, 10 and 30?12.5
12. What is the mode of 9, 2, 4, 2, 6?2
13. Simplify 2a-3a+7a.6a
14. Expand 7(2a+3)14a+21
15. Solve the equation x+7=12x=5
16. Solve the equation 2x-1=11x=6
17. What do the angles in a triangle add up to?180
18. What do the angles at a point add up to?360
19. What is the size of the interior angle in a square?90
20. What type of angle is 192?reflex

 


mental maths : QR Challenge

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

Question 1 (of 20)

 


mental maths : QR Challenge

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

Question 2 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_area_of_a_square_of_side_6cm?

Question 3 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=A_lesson_lasts_for_50_minutes._It_starts_at_13.35,_what_time_will_it_finish?

Question 4 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_sum_of_63_and_72?

Question 5 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_difference_beween_51_and_17?

Question 6 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_product_of_9_and_6?

Question 7 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=Divide_63_by_9

Question 8 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=The_probability_of_a_train_arriving_early_is_0.03._What_is_the_probability_of_it_not_arriving_early?

Question 9 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=I_throw_an_ordinary_dice_numbered_1_to_6._What_is_the_probability_of_getting_an_odd_number?

Question 10 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_mean_of_7,_3,_10_and_30?

Question 11 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_mode_of_9,_2,_4,_2,_6?

Question 12 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=Simplify_2a-3a+7a.

Question 13 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=Expand_7(2a+3)

Question 14 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=Solve_the_equation_x+7=12

Question 15 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=Solve_the_equation_2x-1=11

Question 16 (of 20)

 


mental maths : QR Challenge

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

Question 17 (of 20)

 


mental maths : QR Challenge

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

Question 18 (of 20)

 


mental maths : QR Challenge

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

Question 19 (of 20)

 


mental maths : QR Challenge

https://www.classtools.net/QR/decode.php?text=What_type_of_angle_is_192?

Question 20 (of 20)