QR Challenge: Ratio Practice

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
1. Sal loves French Fries. For every 18 French Fries he eats, he uses 2 Ketchup packets. One afternoon Sal ate 108 French fries. How many Ketchup packets did he use?	12
2.
3. For every 5 baseball cards that Mickey has, Mike has 3baseball cards. If Mike has 72 baseball cards, how many baseball cards does Mickey have?	120
4.
5. Cameron can ran 3.6 miles for every 1.9 miles that Samantha ran. If Samantha ran 7.4 miles, how far did Cameron run?	14.03
6.
7. A backyard pond has 12 sunfish and 30 rainbow shiners. Write the ratio of sunfish to rainbow shiners in simplest form.	2:5 or 2/5
8.
9. Ms. Ekpebe's class has 32 students, of which 20 are girls. Write the ratio of girls to boys.	5:3 or 5/3
10.
11. A recipe calls for butter and sugar in the ratio 2:3. If you're using 6 cups of butter, how many cups of sugar should you use?	9
12.
13. In a cookie mix, we find almond cookies, thumbprint cookies, and molasses cookies in a ratio of 4 : 5 : 3. If a bag of the mix contains 51 molasses cookies, how many almond cookies are there?	68
14.
15. Ethan and Sophia share a reward of $144 in a ratio of 1 : 7. What fraction of the total reward does Ethan get?	1/8
16.
17. In a cookie mix, we find butter cookies, molasses cookies, and chocolate chip cookies in a ratio of 1 : 5 : 2. If a bag of the mix contains 34 chocolate chip cookies, how many butter cookies are there?	17
18.
19. A jar contains 1000 beans. Of them, 300 are black beans and the rest are white beans. What is the ratio of black beans to all the beans?	3:10 or 3 to 10
20.
21. A bag contains 50 marbles, some transparent and some blue. The ratio of transparent marbles to blue ones is 3 : 2. How many transparent marbles are there?	30
22.
23. The sixth grade class is selling pencils. They are putting a ratio of 2 red pencils for every 3 blue pencils in a bag. If the students have 100 red pencils, how many blue pencils do they need?	150
24.
25. Harry can swim 20 laps in a pool in 18 minutes (swimming at a constant speed). How many laps could he swim in 45 minutes? (Swimming with the same speed.)	50
26.
27. A rectangle's length and width are in the ratio of 2:5, and its perimeter is 140 cm. What are the rectangle's length and width?	50,20
28.
29. Miranda enlarged a picture proportionally. Her original picture is 4cm wide and 6cm long. If the new,larger picture is 10cm wide, what is its length?	15
30.
31. The practice range at a golf course charges $4.00 for a bucket of 40 golf balls. At this rate, how much will a bucket of 100 golf balls cost?	$10
32.
33. A model of a park was built on a scale of 1.5 cm to 50 m. If the distance between two trees in the park is 150m, what is this distance on the model?	4.5
34.
35. Jerry read a 200 page book in 10 hours. At that rate, how long will it take him to read a 320 page book?	16

 

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