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QR Challenge: Math Riddles

Created using the ClassTools QR Treasure Hunt Generator

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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

3. Print out the QR codes.

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

1. Q1:How can you add eight 8's to get the number 1,000? (only use addition)888 + 88 + 8 + 8 + 8 = 1,000
2. Q2: Two fathers and two sons sat down to eat eggs for breakfast. They ate exactly three eggs, each person had an egg. The riddle is for you to explain how ?One of the 'fathers' is also a grandfather. Therefore the other father is both a son and a father to the grandson.In other words, the one father is both a son and a father.
3. Q3: A merchant can place 8 large boxes or 10 small boxes into a carton for shipping. In one shipment, he sent a total of 96 boxes. If there are more large boxes than small boxes, how many cartons did he ship?11 cartons total
4. 7 large boxes (7 8 = 56 boxes) 4 small boxes (4 10 = 40 boxes 11 total cartons and 96 boxes
5. Q4: If 4+2=26, 8+1=79 and 6+5=111. Then, what is 7+3?410, because 4+2=26 is because 4-2=2 and 4+2=6,so it is 26. Therefore, 7-3=4 and 7+3=10 (410)
6. Q5: When asked how old she was, Suzie replied, "In two years I will be twice as old as I was five years ago." How old is she?She's 12!

 


Math Riddles: QR Challenge

https://www.classtools.net/QR/decode.php?text=Q1:How-can-you-add-eight-8's-to-get-the-number-1,000?-(only-use-addition)

Question 1 (of 6)

 


Math Riddles: QR Challenge

https://www.classtools.net/QR/decode.php?text=Q2:-Two-fathers-and-two-sons-sat-down-to-eat-eggs-for-breakfast.-They-ate-exactly-three-eggs,-each-person-had-an-egg.-The-riddle-is-for-you-to-explain-how-?

Question 2 (of 6)

 


Math Riddles: QR Challenge

https://www.classtools.net/QR/decode.php?text=Q3:-A-merchant-can-place-8-large-boxes-or-10-small-boxes-into-a-carton-for-shipping.-In-one-shipment,-he-sent-a-total-of-96-boxes.-If-there-are-more-large-boxes-than-small-boxes,-how-many-cartons-did-he-ship?

Question 3 (of 6)

 


Math Riddles: QR Challenge

https://www.classtools.net/QR/decode.php?text=7-large-boxes-(7

Question 4 (of 6)

 


Math Riddles: QR Challenge

https://www.classtools.net/QR/decode.php?text=Q4:-If-4+2=26,-8+1=79-and-6+5=111.-Then,-what-is-7+3?

Question 5 (of 6)

 


Math Riddles: QR Challenge

https://www.classtools.net/QR/decode.php?text=Q5:-When-asked-how-old-she-was,-Suzie-replied,-"In-two-years-I-will-be-twice-as-old-as-I-was-five-years-ago."-How-old-is-she?

Question 6 (of 6)