QR Challenge: Binary numbers

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 15 as a binary number?	1111
What is 110011 as a decimal number?	51
What is the answer to 11 + 101 as a binary number?	1000
What is 100 as a decimal number?	4
What is 19 as a binary number?	10011
What is the answer to 1100 + 1100 as a binary number?	11000
What is 11000 as a decimal number?	24
Which of these binary numbers is larger - 1010110 or 101011?	1010110
What is 7 as a binary number?	111
Which of these binary numbers is larger - 1101 or 1010?	1101
What is 10101 as a decimal number?	21
What is the answer to 111 - 11 as a binary number?	100
what is 10 as a decimal number?	2
What is 54 as a binary number?	110110
What is 101 as a decimal number?	5
What is the answer to 110 + 101 as a binary number?	1011
What is 23 as a binary number?	10111
Which of these binary numbers is larger - 110011 or 100011?	110011
What is 1001001 as a decimal number?	73
What is the answer to 10 + 100 as a binary number?	1100

 

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