# Print

## 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.

### Question

1. The combination of Mr. Smith's lock is the prime factorization of 72. What is the prime factorization of 72?
2. What is the greatest common factor of 90
3. What numbers are 55 divisible by?
4. What is the prime factorization for 150?
5. Find the LCM for 20 and 14.
6. Mrs. Kidd works 35 hours a week. She earns \$9.39 per hour. How much does Mrs. Kidd earn each week?
7. Holly purchases materials to make necklaces. There are 6 beads in a package and 8 stars in a package. What is the least number of watches Holly can make without having any supplies left over?
8. GCF of 49 nd 14.
9. Mr. Lofte teaches 2 science classes. There are 24 students in his Physics class and 32 in his Biology class. If he divided both classes into equal-sized lab groups, what is the greatest number of students in each lab group?
11. Which expression has a value of 13? See board.
12. Solve this expression. See board
13. 45.24 X 2.5
14. 29.00 - 2
15. 1.79 + 0.32
16. 3.213 divided by 0.03
17. Bus A arrives at the bus stop every 12 minutes. Bus B arrives at the bus stop every 10 minutes. In how many minutes will both Bus A and Bus B be at the bus stop at the same time?
18. The high school football team has 24 players. They do a drill with either 8 or 12 players. What is the smallest number of players who can be in the marching band?
19. 12.99 X 0.07
20. 12.68 - 2.99

### Number Theory: QR Challenge

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