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. Jimmy’s mother had four children. She named the first Monday. She named the second Tuesday, and she named the third Wednesday. What is the name of the fourth child? | Jimmy |

2. What five-letter word becomes shorter when you add two letters to it? | short |

3. You are driving a bus. At the first stop, two women get on. The second stop, three men get on and one woman gets off. At the third stop, three kids and their mom get on, and a man gets off. The bus is grey, and it is raining outside. What colour is the bus driver’s hair? | whatever colour your hair is - as you are the bus drive |

4. What word begins and ends with an E but only has one letter? | envelope |

5. What can you hold without ever touching or using your hands? | your breath |

6. A family lives in a large tower apartment building, 10 floors high. Every day their son takes the elevator from the family’s apartment on the 10thfloor to the ground floor and goes to school. When he returns in the afternoon, he uses the elevator to get to the fifth floor, and then uses the stairs for the remaining five floors. Why? | he can’t reach the buttons higher than 5 |

7. What is greater than God, more evil than the devil, the poor have it, the rich need it, and if you eat it, you'll die? | nothing |

8. I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear? | white - you are at the north pole |

9. What can travel around the world while staying in a corner? | stamp |

10. You are in a cookie factory, and need to make a huge batch of chocolate chip cookies. The recipe calls for exactly 4 cups of sugar. Problem is that you have two buckets. One bucket holds 5 cups, the other 3 cups. Using these buckets, how can you measure exactly 4 cups of sugar? | Solution 1: Fill the 3-cup bucket and pour it into the 5-cup bucket. Fill the 3-cup bucket again, and pour it into the 5-cup bucket until the 5-cup bucket is full. That will leave exactly 1 cup of sugar in the 3-cup bucket. Dump out the 5-cup bucket, and dump the 1 cup from the 3-cup bucket into the empty 5-cup bucket. This leaves 1 cup in the 5-cup bucket. Now fill the 3-cup bucket again and add it to the 5-cup bucket. Now you have exactly 4 cups of sugar in the 5-cup bucket!Solution 2: Fill the 5-cup bucket. Pour it into the 3-cup bucket. This leaves 2 cups in the 5-cup bucket. Dump out the 3-cup bucket. Now pour the 2 cups from the 5 cup into the 3 cup. Refill the 5 cup. Now pour the 5 cup into the 3 cup until the 3 cup is full. That will leave exactly 4 cups in the 5-cup bucket! |

11. A man is the owner of a winery who recently passed away. In his will, he left 21 barrels (seven of which are filled with wine, seven of which are half full, and seven of which are empty) to his three sons. However, the wine and barrels must be split, so that each son has the same number of full barrels, the same number of half-full barrels, and the same number of empty barrels. Note that there are no measuring devices handy. How can the barrels and wine be evenly divided? | Two half-full barrels are dumped into one of the empty barrels. Two more half-full barrels are dumped into another one of the empty barrels. This results in nine full barrels, three half-full barrels, and nine empty barrels. Each son gets three full barrels, one half-full barrel, and three empty barrels. |

12. How can you physically stand behind your father while he is standing behind you? | you must be standing back to back |

13. A man is on a game show. He is presented with two doors, one on the left, and one on the right. Behind one is 2 million dollars, and behind the other is a donkey. Choose the correct door to win the prize. There are also two men in front of the doors, and they know which door leads to the millions. One wears a black hat, and the other wears a white hat.The host explains that one of the men is a liar, and will always lie, and the other man will always tell the truth – but you do not know which is which.You can ask only one of the men only one question. What is the question, and which man do you ask to ensure you win the money? | You ask either man the following question: “If I asked the other guy which door has the money, what would he say?” and then choose the opposite door. Work it out: If you ask the question to the liar, he will lie about the ‘correct’ answer, so you must choose the opposite door. If you ask the truth teller, he will tell the truth about the lie, so you can choose the opposite door as well. |

14. Cannibals in the jungle capture three men. The men are given one chance to escape with their lives. The men are lined up and bound to stakes such that one man can see the backs of the other two, the middle man can see the back of the front man, and the front man cannot see anybody. The men are shown five hats, three of which are black and two of which are white. Then the men are blindfolded, and one of the five hats is placed on each man’s head. The remaining two hats are hidden away. The blindfolds are removed. The men are told that if just one of the men can guess what hat he is wearing, they may all go free. Time passes. Finally, the front man, who cannot see anyone, correctly guesses the color of his hat. What color was it, and how did he guess correctly? | The back man can see the hats worn by the two men in front of him. So, if both of those hats were white, he would know that the hat he wore was black. However, since he does not answer, he must see at least one black hat ahead of him. After it becomes apparent to the middle man that the back man cannot figure out what he is wearing, he knows that there is at least one black hat worn by himself and the front man. Knowing this, if the middle man saw a white hat in front of him, he would know that his own hat was black, and could answer the question correctly. But, since he does not answer, he must see a black hat on the front man. After it becomes apparent to the front man that neither of the men behind him can answer the question, he realizes the middle man saw a black hat in front of him. So he says, correctly, “My hat is black.” |

15. How much did you make for washing your hands? | 1 cent |

16. There is a fishing trawler, with a ladder in it, leaning against a wall at the harbor. There are five oars and two fishing nets in the trawler. The distance between two consecutive steps on the ladder is 1 meter. If waves lashing against the wall rise half meter in every half hour, in how much time will six steps of the ladder get under the waves? | The trawler rises with the waves, so no steps will go under water. |

17. As I was going to St. Ives, I met a man with seven wives.Each wife had seven sacks,Each sack had seven cats,Each cat had seven kits.Kits, cats, sacks and wives,How many were going to St. Ives? | One. Only I was going to St. Ives |

18. Guess the next three letters in the series GTNTL | I, T, S. The complete sequence is the first letter of every word in the sentence. |

19. A boy is walking down the road with a doctor. While the boy is the doctor’s son, the doctor is not the boy’s father. Then who is the doctor? | the boy’s mother |

20. Joseph and Lena are found dead on the floor with some water around. The windows are open and a strong wind draft is blowing the curtains around. How did they die? | they are goldfish whose bowl was tipped over by the wind |

21. A man condemned to death has the option of picking one of the mentioned three rooms. The first room is a furnace filled with flames. The second has armed men with loaded guns, while the third has lions starving for years. Which one should the man choose? | The third room, because lions starving for years would be long dead! |

22. His boss replied, “Yes, that’s right. The password is different. Listen carefully. I am sure, you can figure out the new one. The new one has the same amount of letters as your old password, but only four of the letters are the same.””Thanks boss.”With that, the man could correctly log into his station. What are both the new and old passwords? | The old one was “out of date.” The new one is “different.” Both passwords contain the letters d, f, e, and t. |

23. The number 8,549,176,320 is a unique number. What is so special about it? | This is the only number that includes all the digits arranged in alphabetical order. |

24. Your parents have six sons including you and each son has one sister. How many people are in the family? | Nine. Two parents, six sons, and one daughter. All of them have one sister (not six sisters). |

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