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. (C)I have a triangle that has three angles which are all square numbers. What are the angles? | 100-64-16 |

2. (N)After you unload all your coins onto the kitchen table, you discover something surprising. You have exactly the same number of pennies, 10p, 20p, and 5p, totaling 6 pounds and 12 pence. How many of each coin do you have? | 17 |

3. (C)If 8 crows can steal 8 buttons in 8 minutes, how many buttons can 16 crows steal in 16 minutes? | 32 |

4. (P)The ages of a father and son add up to 66.The father\\\\\\\'s age is the son\\\\\\\'s age reversed.How old could they be? | 42and24 |

5. (V)1011 in binary is what in base ten? | 11 |

6. (W)Can you replace the question marks with maths symbols ( + - / x) and make the equation correct:(9 ? 1) ? (7 ? 6) ? (8 ? 4) = 3 | (9 - 1)-(7 - 6)-(8 - 4)=3 |

7. (T)What was the name of the German encryption machine used in World War 2 that the English thought was a ‘riddle’? | ENIGMA |

8. (K)Cryptography is an ancient Greek Word meaning what? | HIDDEN WORDS |

9. (P)The British made the first computer to break German codes. It was huge. What was it called? | COLOSSUS |

10. (I)The British intercepted a famous telegram that caused the USA to declare war on Germany in 1917. What was the telegram’s name? | ZIMMERMANN |

11. (Y)During the American War of Independence who was the leader of the American army who used spies to crack the British codes? | GEORGE WASHINGTON |

12. (C)Which famous Roman General and Emperor invented his own type of code that still has his name today? | JULIUS CAESAR |

13. (U)Substitution Ciphers (code keys) were broken by which famous Arab Mathematician? | AL KINDI |

14. (C)Mary Queen of Scots’ letters were intercepted and de coded in which famous plot? | BABINGTON PLOT |

15. (I)What was the ‘coloured’ Japanese code from World War II? | PURPLE |

16. (G)What was the name of the seafaring (5x8) British department responsible for breaking German codes in World War One? | ADMIRALTY ROOM 40 |

17. (P)A lamp and a bulb cost 32 pounds. The lamp is 30 pounds more than the bulb. How much is the lamp? | 31 |

18. (K)What number does the Roman numeral MMLXIV represent? | 2064 |

19. (W)How many sides does a hexaheptacontagon have? | 76 |

20. (U)What is the product of a bakers dozen and the difference between a gross and a 4 scores? | 832 |

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