# Teacher Notes

## 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.

### Questions / Answers (teacher reference)

 Question Answer Which subset of numbers contains only prime numbers:[3,5,7,9];[11,13,17,19];[2,4,6,8];[27,33,39,41]? [11,13,17,19] List the first four multiples of 9. 9,18,27,36 Which of the following numbers is divisible by 6 and 5: a. 3,930 b. 3,915 c. 4,235 d. 1,240 a. 3,930 Is 25 + 56 even or odd? odd What is the prime factorization of 36? 2X2X3X3 What is the greatest common factor of 12 and 6? 6 What is the least common multiple of 24 and 36? 12 What is (7 X 10,000) + (5 X 1,000) + (9 X 10) + (4 X 1)? 75,094 In 4,932.765, what number is in the thousandths place? 5 What is 0.67 X 1,000? 670 Which is a better buy, 6-pack of scented candles for \$4.68 or a 9-pack of scented candles for \$6.48? 9-pack for \$6.48 What is 9.8 X 8? 78.4 What is 65 X 0.8? 52 What is 0.85 X 0.2? 0.17 Which sign makes the sentence true: 4.2 _ 2 X 2.1? <,>,= What is 981 divided by 100? 9.81 Tom went to the store and bought five pounds of apples for \$4.95. How much did he pay for each pound? 0.99 Which equation shows the identity property of multiplication: (8 X 9) X 5 = 8 X (9 X 5), 4 X 1 = 4, 9 X 8 = 8 X 9 or 2 X 1 = 1 X 2? 4 X 1 = 4 Which fraction is equivalent to 6/18: 1/2, 1/3 or 2/9? 1/3 What is 9/36 in lowest terms? 1/4 What is 1/10 X 2/7 in simplest form? 1/35 What is 1/3 divided by 1/9? 3 What is the least common denominator of 1/4 and 1/6? 12 Which set of fractions is ordered from least to greatest: 1/4 < 1/3 < 1/2 or 1/3 < 1/2 < 1/4 or 1/4 < 1/2 < 1/3 or 1/2 < 1/3 < 1/4? 1/4 < 1/3 < 1/2 What is 4/6 – 3/6? 1/6 What is 5 and 1/10 + 2 and 1/10? 7 and 1/5 What is 1/9 + 4/9? 5/9 What is 7 and 6/11 – 2 and 1/11? 5 and 5/11 What is 2/5 + 3/10? 7/10 What is 5/8 – 1/2? 1/8 What is 9 and 1/4 + 8 and 1/2? 17 and 3/4 Subtract 12 and 1/6 – 3 and 1/2. 8 and 2/3 Write 0.65 as a fraction in simplest form. 13/20 What is 3/25 as a decimal and as a percent? 0.12 and 12% Multiply 5 and 2/9 times 7. 36 and 5/9 Multiply 3 and 1/5 times 4 and 2/7. 13 and 5/7 Some fifth grade students took a survey about their favorite outdoor activities. 1/8 chose biking, 1/2 chose running and 3/8 chose fishing. Which activity received the fewest votes? biking What is the area of a square that has a perimeter of 24 inches? 36 square inches What is the area of a parallelogram that has a height of 2 cm and a base of 7cm? 14 square centimeters What is the area of a triangle that has a base of 16 mm and a height of 18 mm? 144 square millimeters What is the area of a triangle that has a height of 10 in and a base of 5 in? 25 square inches Which is more 1 pound or 32 ounces? 32 ounces 3 gallons and 9 cups would be equal to how many cups? 57 cups How many cups would equal 1/4 of a gallon? 4 cups How many centimeters are in 5 meters? 500 cm A piece of wood is 3 feet long. Are 3 pieces of wood longer than 4 yards? no What is the volume of an object that has a length of 3 cm, a width of 2 cm and a height of 2 cm? 12 cubic centimeters What is the volume of a rectangular prism that has a base of 40 yards and a height of 4 yards? 160 cubic yards What is the area of a circle that has a radius of 5 in? 78.5 square inches What is the area of a circle that has a diameter of 8 mm? 50.24 square millimeters A circle has a diameter of 3 cm. What is the circumference? 9.42 Find the value of the expression 5 + j, where j = 10. 15 Find the value of x in the following equation: 4x + 16 = 48. x = 8 Find the value of s in the following equation: 7s – 37 = 33. s = 10 Write 0.3 as a percent. 30% Tina wanted to buy a shirt for \$36. The shirt was on sale for 25% off. What was the price of the shirt aftr the discount? \$27

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