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QR Challenge: Percentages

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. 3. A library has 2500 books. 40% of the books are fiction. How many books are not fiction books?answer
2. 4. A cyclist rides 460 miles each week in training. She covers 30% of the miles in one ride. How many miles are left after 1 ride?answer
3. 5. A charity raises £1740 at an auction. 20% of the money was raised by auctioning one item. How much did the rest of the auction raise?answer
4. 6. 680 pupils attend a primary school. 20% of the children are in the Foundation Stage and 25% are in Key Stage 1. How many children are in Key Stage 2?answer
5. 7. Janek’s height increases by 10% each year for two years. At the beginning of those two years, he was 120cm tall. How tall is he at the end of the two years?answer
6. 8. 90 000 people attend the FA cup final. 10% are not fans of either team. 50% of the remaining fans are from each team. How many fans from each team attend the final?answer
7. 9. 450g of flour is needed for a cake recipe. A new packet of 2kg flour is used. 20% of the remaining flour is used to make some pastry. How much flour is used to make pastry?answer
8. 10. There are 450 chairs in a school. 80% of the chairs are in good condition. Of the remaining chairs, 40% need to be thrown away. How many chairs need to be thrown away?answer
9. 11. In a class of 30 children, 10% cycle to school. Another 10% come by bus. 25% of the remaining children come by car. The rest of the children walk. How many children walk to school?answer
10. 12. The population of a town is 24 400. 25% of the people are children. 10% of the children are under the age of two. How many children under the age of two live in the town?answer
11. 13. A school orders 80 packs of pencils. Each pack contains 12 pencils. 10% of the pencils are given out the day they arrive in school. How many pencils are given out on that first day?answer
12. 14. A bakery uses 48kg of flour each day to bake bread. 2kg of flour makes three loaves of bread. 25% of the loaves are wholemeal loaves. How many wholemeal loaves are baked each day?answer

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.-A-library-has-2500-books.-40%-of-the-books-are-fiction.-How-many-books-are-not-fiction-books?

Question 1 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=4.-A-cyclist-rides-460-miles-each-week-in-training.-She-covers-30%-of-the-miles-in-one-ride.-How-many-miles-are-left-after-1-ride?

Question 2 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=5.-A-charity-raises-£1740-at-an-auction.-20%-of-the-money-was-raised-by-auctioning-one-item.-How-much-did-the-rest-of-the-auction-raise?

Question 3 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=6.-680-pupils-attend-a-primary-school.-20%-of-the-children-are-in-the-Foundation-Stage-and-25%-are-in-Key-Stage-1.-How-many-children-are-in-Key-Stage-2?

Question 4 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.-Janek’s-height-increases-by-10%-each-year-for-two-years.-At-the-beginning-of-those-two-years,-he-was-120cm-tall.-How-tall-is-he-at-the-end-of-the-two-years?

Question 5 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=8.-90-000-people-attend-the-FA-cup-final.-10%-are-not-fans-of-either-team.-50%-of-the-remaining-fans-are-from-each-team.-How-many-fans-from-each-team-attend-the-final?

Question 6 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=9.-450g-of-flour-is-needed-for-a-cake-recipe.-A-new-packet-of-2kg-flour-is-used.-20%-of-the-remaining-flour-is-used-to-make-some-pastry.-How-much-flour-is-used-to-make-pastry?

Question 7 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.-There-are-450-chairs-in-a-school.-80%-of-the-chairs-are-in-good-condition.-Of-the-remaining-chairs,-40%-need-to-be-thrown-away.-How-many-chairs-need-to-be-thrown-away?

Question 8 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=11.-In-a-class-of-30-children,-10%-cycle-to-school.-Another-10%-come-by-bus.-25%-of-the-remaining-children-come-by-car.-The-rest-of-the-children-walk.-How-many-children-walk-to-school?

Question 9 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=12.-The-population-of-a-town-is-24-400.-25%-of-the-people-are-children.-10%-of-the-children-are-under-the-age-of-two.-How-many-children-under-the-age-of-two-live-in-the-town?

Question 10 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=13.-A-school-orders-80-packs-of-pencils.-Each-pack-contains-12-pencils.-10%-of-the-pencils-are-given-out-the-day-they-arrive-in-school.-How-many-pencils-are-given-out-on-that-first-day?

Question 11 (of 12)

 


Percentages: QR Challenge

https://www.classtools.net/QR/decode.php?text=14.-A-bakery-uses-48kg-of-flour-each-day-to-bake-bread.-2kg-of-flour-makes-three-loaves-of-bread.-25%-of-the-loaves-are-wholemeal-loaves.-How-many-wholemeal-loaves-are-baked-each-day?

Question 12 (of 12)