 # QR Challenge: Decimals and Ratios Review

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### Create a New Quiz | Edit this quiz # 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

• Bring these devices into the lesson.

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 What is 2.45 x 1.2? 2.94 What is 18.1 x 2.4? 43.44 What is 0.46 x 3.8? 1.748 What is 0.0035 x 0.27? 0.000945 What is 0.078 x 0.034? 0.002652 What is 0.123 x 1/4? 0.03075 What is 318 - 2.45? 315.55 What is 48.17 - 2.56? 45.61 What is 3.5 + 35 + 0.35? 38.85 What is 189 + 13.5? 202.5 What is 20.6 + 1.45? 22.05 What is 0.57 + 87? 87.57 What is 8.35 divided by 0.4? 20.875 What is 7.21 divided by 5? 1.442 What is 5 divided by 6? Answer with a fraction and a decimal. 5/6 and 0.8333… What is 5 divided by 8? Answer with a fraction and decimal. 5/8 and 0.625 What is 4 divided by 0.08? 50 What is 7 divided by 11? Answer with a fraction and a decimal. 7/11 and 0.636363… What is 19 divided by 11? Answer with a fraction and a decimal. 1 8/11 and 1.727272… For every 3 cats at an animal shelter, there are 7 dogs. If there are 210 animals, how many more dogs than cats are there? 84 more dogs than cats For every 4 students that attended the football game, there were 7 adults. If there were 280 adults, how many students were there? 160 students The donut shop sells 8 regular glazed donuts for every 5 chocolate glazed and for every 3 strawberry glazed. If they sell 1,600 donuts, how many strawberry glazed did they sell? 300 strawberry glazed donuts The ratio of lemon juice to water to sugar in Sarah’s lemonade recipe is 2:6:3. If you use 22 tablespoons of ingredients, how much of each ingredient did you use? 4 tbs of lemon juice, 12 tbs of water, and 6 tbs of sugar. 1 out of every 8 students in a class forgot their homework. If 4 students forgot their homework, how many students did their homework? 28 students A train is traveling at a rate of 140 miles every 2 hours. At this speed, how long will it take the train to travel 2,800 miles? 40 hours An airplane company allows 50 lbs of luggage weight per passenger. If a Boeing 747 plane can hold 416 passengers, and every passenger brings the maximum weight of luggage allowed, how much would all their luggage weigh? 20,800 lbs For each person that likes Pepsi best, there are 3 who prefer Coke. In a class of 20 people, how many will prefer Pepsi? 5 people will prefer Pepsi When making the Harry Potter movies, the creators used a scale of 2:3 in scenes featuring Hagrid (average man's height to Hagrid's height). If the average bed is 6 and 1/2 feet long, how long should Hagrid's bed be? 9 ¾ feet long ### Decimals and Ratios Review: QR Challenge Question 1 (of 28) ### Decimals and Ratios Review: QR Challenge Question 2 (of 28) ### Decimals and Ratios Review: QR Challenge Question 3 (of 28) ### Decimals and Ratios Review: QR Challenge Question 4 (of 28) ### Decimals and Ratios Review: QR Challenge Question 5 (of 28) ### Decimals and Ratios Review: QR Challenge Question 6 (of 28) ### Decimals and Ratios Review: QR Challenge Question 7 (of 28) ### Decimals and Ratios Review: QR Challenge Question 8 (of 28) ### Decimals and Ratios Review: QR Challenge Question 9 (of 28) ### Decimals and Ratios Review: QR Challenge Question 10 (of 28) ### Decimals and Ratios Review: QR Challenge Question 11 (of 28) ### Decimals and Ratios Review: QR Challenge Question 12 (of 28) ### Decimals and Ratios Review: QR Challenge Question 13 (of 28) ### Decimals and Ratios Review: QR Challenge Question 14 (of 28) ### Decimals and Ratios Review: QR Challenge Question 15 (of 28) ### Decimals and Ratios Review: QR Challenge Question 16 (of 28) ### Decimals and Ratios Review: QR Challenge Question 17 (of 28) ### Decimals and Ratios Review: QR Challenge Question 18 (of 28) ### Decimals and Ratios Review: QR Challenge Question 19 (of 28) ### Decimals and Ratios Review: QR Challenge Question 20 (of 28) ### Decimals and Ratios Review: QR Challenge Question 21 (of 28) ### Decimals and Ratios Review: QR Challenge Question 22 (of 28) ### Decimals and Ratios Review: QR Challenge Question 23 (of 28) ### Decimals and Ratios Review: QR Challenge Question 24 (of 28) ### Decimals and Ratios Review: QR Challenge Question 25 (of 28) ### Decimals and Ratios Review: QR Challenge Question 26 (of 28) ### Decimals and Ratios Review: QR Challenge Question 27 (of 28) ### Decimals and Ratios Review: QR Challenge Question 28 (of 28)