QR Challenge: MATHS CHALLENGE Week 9
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. If each child can blow up 3 balloons in 1 minute, how many balloons can a group of 5 children blow up in 2 minutes? | 30
|
2. A TV cost $460 and Sam has only paid $46. How much more does he have to pay? | $414
| 3. Brett is 12 years old. Daniella is half of Brett’s age. Oscar is 13 years older than Daniella. How old is Oscar? | 19
| 4. How much would you save with a supermarket ‘4 c off per litre’ petrol voucher if you buy 30 litres of petrol? | $1.20
| 5. Henry covers his desk using 100 post-it notes. Sally’s post-it notes are half the area of Henry’s and her desk is twice the area. How many of Sally’s post-it notes will she need to cover her desk? | 400
| 6. Mel’s crayons are red, green and blue and he has at least one green crayon. If all of them are green except two, all of them are blue except 2 and all are red except 2, how many crayons does Mel have? | 3
| 7. When a maths class is split into groups of four, there are two students left. When split into groups of 5, there is one left. There are 15 girls in the class and a smaller number of boys. How many boys are there in the class? | 11
| 8. You will need to use picture A. The number in each block is the sum of the numbers in the two blocks below it. What number should be in the top block? | 32
| 9. You will need to use picture B. A large square contains two small squares with areas 25 square centimetres and 4 square centimetres. What is the perimeter, in centimetres, of the shaded area? | 21cm
| 10. There are five blocks of different colours stacked on top of each other. The red block is above the purple block, the blue block is underneath the orange block and the green block is below the blue and above the red. Which colour is the bottom block? (Try using blocks for this one) | Purple
| 11. Lisa collected 50 seashells over a period of five days. Each day she collected three more than she had collected the day before. How many shells did she collect on the fifth day? | 16
| 12. I roll two dice with the numbers 1 to 6 on each one and obtain a total of 9. Which of the following numbers could not have been rolled? (A) 2 (B) 3 (C) 4 (D) 5 (E) 6 | (A)2
| 13. A bus carries 32 students. How many buses are needed to take 323 students to the school swimming carnival? | 11
| 14. It takes 3 oranges to make a glass of orange juice. How many oranges are needed to make 8 glasses of juice? | 24
| 15. A carpenter made 20 chairs and stools with a total number of 73 legs. If the chairs each have 4 legs and the stools each have 3 legs, how many chairs did he make? | 13 |
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=If-each-child-can-blow-up-3-balloons-in-1-minute,-how-many-balloons-can-a-group-of-5-children-blow-up-in-2-minutes?
Question 1 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=A-TV-cost-$460-and-Sam-has-only-paid-$46.-How-much-more-does-he-have-to-pay?
Question 2 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=Brett-is-12-years-old.-Daniella-is-half-of-Brett’s-age.-Oscar-is-13-years-older-than-Daniella.-How-old-is-Oscar?
Question 3 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=How-much-would-you-save-with-a-supermarket-‘4-c-off-per-litre’-petrol-voucher-if-you-buy-30-litres-of-petrol?
Question 4 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=Henry-covers-his-desk-using-100-post-it-notes.-Sally’s-post-it-notes-are-half-the-area-of-Henry’s-and-her-desk-is-twice-the-area.-How-many-of-Sally’s-post-it-notes-will-she-need-to-cover-her-desk?
Question 5 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=Mel’s-crayons-are-red,-green-and-blue-and-he-has-at-least-one-green-crayon.-If-all-of-them-are-green-except-two,-all-of-them-are-blue-except-2-and-all-are-red-except-2,-how-many-crayons-does-Mel-have?
Question 6 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=When-a-maths-class-is-split-into-groups-of-four,-there-are-two-students-left.-When-split-into-groups-of-5,-there-is-one-left.-There-are-15-girls-in-the-class-and-a-smaller-number-of-boys.-How-many-boys-are-there-in-the-class?
Question 7 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=You-will-need-to-use-picture-A.-The-number-in-each-block-is-the-sum-of-the-numbers-in-the-two-blocks-below-it.-What-number-should-be-in-the-top-block?
Question 8 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=You-will-need-to-use-picture-B.-A-large-square-contains-two-small-squares-with-areas-25-square-centimetres-and-4-square-centimetres.-What-is-the-perimeter,-in-centimetres,-of-the-shaded-area?
Question 9 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=There-are-five-blocks-of-different-colours-stacked-on-top-of-each-other.-The-red-block-is-above-the-purple-block,-the-blue-block-is-underneath-the-orange-block-and-the-green-block-is-below-the-blue-and-above-the-red.-Which-colour-is-the-bottom-block?-(Try-using-blocks-for-this-one)
Question 10 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=Lisa-collected-50-seashells-over-a-period-of-five-days.-Each-day-she-collected-three-more-than-she-had-collected-the-day-before.-How-many-shells-did-she-collect-on-the-fifth-day?
Question 11 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=I-roll-two-dice-with-the-numbers-1-to-6-on-each-one-and-obtain-a-total-of-9.-Which-of-the-following-numbers-could-not-have-been-rolled?-(A)-2-(B)-3-(C)-4-(D)-5-(E)-6
Question 12 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=A-bus-carries-32-students.-How-many-buses-are-needed-to-take-323-students-to-the-school-swimming-carnival?
Question 13 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=It-takes-3-oranges-to-make-a-glass-of-orange-juice.-How-many-oranges-are-needed-to-make-8-glasses-of-juice?
Question 14 (of 15)
MATHS CHALLENGE Week 9: QR Challenge
https://www.classtools.net/QR/decode.php?text=A-carpenter-made-20-chairs-and-stools-with-a-total-number-of-73-legs.-If-the-chairs-each-have-4-legs-and-the-stools-each-have-3-legs,-how-many-chairs-did-he-make?
Question 15 (of 15)
