QR Challenge: Chapter 4 Review
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. Helium gas accounts for less than 0.01% of Earth's atmospheric gases. Write this percent as a fraction in simplest form. | 1/10,000
|
2. The stock of a particular company skyrocketed 1,550% in a one-month period. Write this percent as a decimal. | 15.5
| 3. Venus's diameter is 0.87% of the Sun's diameter. Write this as a decimal. | 0.0087
| 4. Jocelyn expects her new software company to increase its sales next year 2 and 3/4 times their present value. Write this increase as a percent. | 275%
| 5. The Quality Assurance department at a gear company found that there were 3 defective gears for every 500 produced. Write this as a percent. | 0.6%
| 6. Bert got a puppy 8 weeks ago. In this time, the puppy's weight increased 215%. Write this percent as a decimal. | 2.15
| 7. True or False, the decimal 4.65 represents a percent greater than 100%? | true
| 8. True or False, the fraction 3/5 represents a percent greater than 100%? | false
| 9. True or False, the decimal 0.125 represents a percent less than 1%? | true
| 10. True or False, 33/23 represents a percent greater than 100%? | true
| 11. Find 5% of 180. | 9
| 12. Find 20% of $3.20. | 0.64
| 13. Find 0.1% of 600. | 0.6
| 14. Find 4/5% of 15. | 0.12
| 15. Find 450% of 300. | 1350
| 16. Find 23 and 1/8% of $356.80. | $82.51
| 17. The Nile River is about 209% the length of the Yukon River. The Yukon River is 3168 km, how long is the Nile River (to the nearest km)? | 6621
| 18. A clothing store had a 30% off sale one week. The next week, the sale offered another 20% off all jackets. If the original price of a jacket was $120, what was the price in the second week? | $67.20
| 19. A camera normally costs $120. You still need to pay 6% PST and 5% GST. Find the total cost of the camera, including tax. | $133.20 |
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Helium-gas-accounts-for-less-than-0.01%-of-Earth's-atmospheric-gases.-Write-this-percent-as-a-fraction-in-simplest-form.
Question 1 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The-stock-of-a-particular-company-skyrocketed-1,550%-in-a-one-month-period.-Write-this-percent-as-a-decimal.
Question 2 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Venus's-diameter-is-0.87%-of-the-Sun's-diameter.-Write-this-as-a-decimal.
Question 3 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Jocelyn-expects-her-new-software-company-to-increase-its-sales-next-year-2-and-3/4-times-their-present-value.-Write-this-increase-as-a-percent.
Question 4 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The-Quality-Assurance-department-at-a-gear-company-found-that-there-were-3-defective-gears-for-every-500-produced.-Write-this-as-a-percent.
Question 5 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Bert-got-a-puppy-8-weeks-ago.-In-this-time,-the-puppy's-weight-increased-215%.-Write-this-percent-as-a-decimal.
Question 6 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=True-or-False,-the-decimal-4.65-represents-a-percent-greater-than-100%?
Question 7 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=True-or-False,-the-fraction-3/5-represents-a-percent-greater-than-100%?
Question 8 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=True-or-False,-the-decimal-0.125-represents-a-percent-less-than-1%?
Question 9 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=True-or-False,-33/23-represents-a-percent-greater-than-100%?
Question 10 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Find-5%-of-180.
Question 11 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Find-20%-of-$3.20.
Question 12 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Find-0.1%-of-600.
Question 13 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Find-4/5%-of-15.
Question 14 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Find-450%-of-300.
Question 15 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Find-23-and-1/8%-of-$356.80.
Question 16 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The-Nile-River-is-about-209%-the-length-of-the-Yukon-River.-The-Yukon-River-is-3168-km,-how-long-is-the-Nile-River-(to-the-nearest-km)?
Question 17 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=A-clothing-store-had-a-30%-off-sale-one-week.-The-next-week,-the-sale-offered-another-20%-off-all-jackets.-If-the-original-price-of-a-jacket-was-$120,-what-was-the-price-in-the-second-week?
Question 18 (of 19)
Chapter 4 Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=A-camera-normally-costs-$120.-You-still-need-to-pay-6%-PST-and-5%-GST.-Find-the-total-cost-of-the-camera,-including-tax.
Question 19 (of 19)
