QR Challenge: Decimals and Ratios Review

Created using the ClassTools QR Treasure Hunt Generator

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.

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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!

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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.

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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

 

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