# 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. Multiply 8 by 864
2. How many nines are there in 63?7
3. What number should you ad to -5 to get the answer 6?11
4. I'm thinking of a number I call it n. I square my number and add 3. Write an expression to show the resultn2+3
5. What number is 3 cubed?27
6. A bat flies at an average speed of thiry kilometres per hour. At this speed, how far would it fly in ten minutes?5km/h
7. Subtract nought point three from seven6.7
8. Write down two numbers which are multiples of 88, 16, 24...
9. A drink costs 49p. How much will 7 drinks cost?£3.43
10. I buy two cakes costing £3.55 eac. How much change will I get from £10?£2.90
11. A sequence has a rule: multiply by 2 and add1. What are the first 3 terms of this sequence?3,5,7
12. A fair 6 sided spinner has 4 even numbers and 2 odd numbers. What is the probability of getting an even number?2/3
13. Twenty five percent of a number is 8. What is the number?32
14. What is three-fifths of £30?£18
15. What is the volume of a cuboid measuring 4cm by 3cm by 5cm60cm3
16. Evalute the expression 5k+1 when k=421

### Mental maths 2003a: QR Challenge

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