QR Challenge: SAT Arithmetic

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. X and y are integers. If x is divided by y, then the quotient is 7. If the sum of x and y is 40, what is the value of x?	35
2. If 9 to the x power equals 81, then 3(3^x) =	27
3. If the sum of 3 unequal positive integers equals 22, what is the smallest possible value of the largest integer?	9
4. What is the smallest of seven consecutive even integers whose sum is 700?	94
5. If p, q, and r are, in increasing order, the three smallest primes, what is the value of (p + q + r) ^ q?	1000
6. Eric takes 4 minutes to run around the school track. Andy can run around the track in 6 minutes. If they start running together, and keep running at their same rates, how many minutes will it take before they both are seen crossing the starting line together?	12
7. Sam owns 5/9 of a bicycle repair business and sells part of his share to Joey, giving Joey a 1/3 interest in the business. What fractional part of Sam’s interest did he sell to Joey?	3/5

 

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