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
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. 1.A cinema screen is measured as 6 m by 15 m, to the nearest metre. Calculate the limits of accuracy for the area of the screen. | 1234 | 2. 2.The measurements, to the nearest centimetre, of a box are given as 10 cm by 7 cm by 4 cm. Calculate the limits of accuracy for the volume of the box. | 1234 | 3. 3.Mr Sparks is an electrician. He has a 50-m roll of cable, correct to the nearest metre.He uses 10 m on each job, to the nearest metre.If he does four jobs, what is the maximum amount of cable he will have left? | 1234 | 4. 4.Jon and Matt are exactly 7 miles apart. They are walking towards each other. Jon is walking at 4 mph and Matt is walking at 2 mph.Both speeds are given to the nearest mile per hour.Without doing any time calculations, decide whether it is possible for them to meet in 1 hour. Justify your answer. | 1234 | 5. 5.The area of a rectangular field is given as 350 m2, to the nearest 10 m2. One length is given as 16 m, to the nearest metre. Find the limits of accuracy for the other length of the field. | 1234 | 6. 6.In triangle ABC, AB=9 cm, BC=7 cm and ∠ABC=37º. All the measurements are given to the nearest unit. Calculate the limits of accuracy for the area of the triangle. | 1234 | 7. 7.The price of pure gold is £18.25 per gram. The density of gold is 19.3 g/cm3.(Assume these figures are exact.) A solid gold bar in the shape of a cuboid has sides 4.6 cm, 2.2 cm and 6.6 cm. These measurements are made to the nearest 0.1 cm.a. i. What are the limits of accuracy for the volume of this gold bar?ii. What are the upper and lower limits of the cost of this bar?The gold bar was weighed and given a mass of 1296g, to the nearest gram.b. What are the upper and lower limits for the cost of the bar now?c. Explain why the price ranges are so different. | 1234 | 8. 8.A stopwatch records the time for the winner of a 100-m race as 14.7 seconds, measured to the nearest one-tenth of a second.a. What are the greatest and least possible times for the winner?b. The length of the 100-m track is correct to the nearest metre. What are the greatest and least possible lengths of the track?c. What is the fastest possible average speed of the winner, with a time of 14.7 seconds in the 100-m race?b. The calculated volume of the cube? | 1234 | 9. 10.A cube has a volume of 40 cm3, to the nearest cubic centimetre. Find the range of possible values of the side length of the cube. | 1234 | 10. 11.A cube has a volume of 200 cm3, to the nearest 10 cm3. Find the limits of accuracy of the side length of the cube. | 1234 |
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