Detailed Case Study Search the Archive Feedback

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.

4. Cut them out and place them around your class / school.

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!

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

## Question | ## Answer |

1. What is the difference between 58 and 87? | 29 |

2. If A=1, B=2, C=3, ..., Z=26, work out the value of: M + A + T + H + S | 61 |

3. If 7 x 9 = 63 and 70 x 9 = 630, what is 700 x 9? | 6300 |

4. How much change, in cents, do I get if I buy 3 postcards at 55c with a $2 coin? | 35 |

5. I thought of a number. Then I added 2. Then I multiplied by 4. Then I divided by 5. The answer was 20. What was the number I first thought of? | 23 |

6. What is the 7th prime number? | 17 |

7. Susan and Mary were each given the same amount of money. Susan bought 4 peaches and had 4c left over. Mary bought 3 peaches and had 13c left over. How much did one peach cost? | 9c |

8. What is the total number of spots on a die (or dice)? | 22 |

9. If A=1, B=2, C=3, ... , Z=26, work out the value of: M - A + T - H - S. | 5 |

10. Think of a number. Add 6. Double it. Take away 2. Double it again. Add 24. Divide by 4. Take away the number you started with and what is left? Hint: Check again with another starting number. | 11 |

11. The Jones family went on holiday on 28th July and they returned on 15th August. How may night were they away? | 18 nights |

12. Think of a number. Add 7. Multiply by 4. Take away 2. Divide by 2. Add 19. Divide by 2. Take away the number you started with and what is left? Hint: Check again with another starting number. | 16 |

13. What is the highest common factor (HCF) of 78 and 130. | 26 |

14. A tree doubles in height every year. The first year it is 1 metre all. How tall is the tree in the 4th year? | 8 metres |

15. 1, 3, 6, 10, ... etc. are triangular numbers. Work out the 7th triangular number. Hint: 1, 1 + 2 = 3, 1 + 2 + 3 = 6, etc. | 28 |

16. Jacob was born on 1st July 2001. Work out his age (in years) on 1st January 2012. | 10 |

17. How many degrees are all the angles in an equilateral triangle? | 60 |

18. A car is travelling at 50 kilometres per hour. After 2 hours the car has travelled 100 kilometres. How far would the car have travelled after 4 hours? | 200 km |

19. My sister was 10 years old when I was born in 2010. How old will she be when she is exactly double my age? | 20 |

20. What is the lowest common multiple (LCM) of 24 and 30? | 120 |

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