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QR Challenge: Is it GCF or LCM?

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. Two bikers are riding a circular path. The first rider completes a round in 12 minutes. The second rider completes a round in 18 minutes. If they both started at the same place and time and go in the same direction, after how many minutes will they meet again at the starting point?36
2. Joanne is campaigning for class president and plans to distribute some campaign materials: 20 flyers and 16 buttons. She wants each classroom to receive an identical set of campaign materials, without having any materials left over. What is the greatest number of classrooms Joanne can distribute materials to?4
3. Matthew goes hiking every 12 days and swimming every 6 days. He did both kinds of exercise today. How many days from now will he go both hiking and swimming again?12
4. Deena is packing equal numbers of apple slices and grapes for snacks. Deena bags the apple slices in groups of 18 and the grapes in groups of 9. What is the smallest number of grapes that she can pack?18
5. A club has 16 girls and 8 boys as members. The president wants to break the club into groups, with each group containing the same combination of girls and boys. The president also wants to make sure that no one is left out. What is the greatest number of groups the president can make?8
6. Nathan is stocking bathrooms at the hotel where he works. He has 18 rolls of toilet paper and 9 bars of soap. If he wants all bathrooms to be stocked identically, with the same combination of supplies in each one and nothing left over, what is the greatest combination of bathrooms Nathan can stock?9
7. In preparation for a party, Brant is putting desserts onto platters. The chocolate cake is cut into 15 pieces and the cheesecake is cut into 6 pieces. If he wants to prepare identical platters without having any cake left over, what is the greatest number of platters he can prepare?3
8. Sean has 8-inch pieces of toy train track and Ruth has 18-inch pieces of train track. How many of each piece would each child need to build tracks that are equal in length?72
9. The radio station gave away a $100 bill for every 100th caller. Every 30th caller received free concert tickets. How many callers must get through before one of them receives both a coupon and a concert ticket?300
10. Mrs. Evans has 120 crayons and 30 pieces of paper to give to her students. What is the largest number of students she can have in her class so that each student gets equal number of crayons and equal number of paper?30

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Two_bikers_are_riding_a_circular_path._The_first_rider_completes_a_round_in_12_minutes._The_second_rider_completes_a_round_in_18_minutes._If_they_both_started_at_the_same_place_and_time_and_go_in_the_same_direction,_after_how_many_minutes_will_they_meet_again_at_the_starting_point?

Question 1 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Joanne_is_campaigning_for_class_president_and_plans_to_distribute_some_campaign_materials:_20_flyers_and_16_buttons._She_wants_each_classroom_to_receive_an_identical_set_of_campaign_materials,_without_having_any_materials_left_over._What_is_the_greatest_number_of_classrooms_Joanne_can_distribute_materials_to?

Question 2 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Matthew_goes_hiking_every_12_days_and_swimming_every_6_days._He_did_both_kinds_of_exercise_today._How_many_days_from_now_will_he_go_both_hiking_and_swimming_again?

Question 3 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Deena_is_packing_equal_numbers_of_apple_slices_and_grapes_for_snacks._Deena_bags_the_apple_slices_in_groups_of_18_and_the_grapes_in_groups_of_9._What_is_the_smallest_number_of_grapes_that_she_can_pack?

Question 4 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_club_has_16_girls_and_8_boys_as_members._The_president_wants_to_break_the_club_into_groups,_with_each_group_containing_the_same_combination_of_girls_and_boys._The_president_also_wants_to_make_sure_that_no_one_is_left_out._What_is_the_greatest_number_of_groups_the_president_can_make?

Question 5 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Nathan_is_stocking_bathrooms_at_the_hotel_where_he_works._He_has_18_rolls_of_toilet_paper_and_9_bars_of_soap._If_he_wants_all_bathrooms_to_be_stocked_identically,_with_the_same_combination_of_supplies_in_each_one_and_nothing_left_over,_what_is_the_greatest_combination_of_bathrooms_Nathan_can_stock?

Question 6 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=In_preparation_for_a_party,_Brant_is_putting_desserts_onto_platters._The_chocolate_cake_is_cut_into_15_pieces_and_the_cheesecake_is_cut_into_6_pieces._If_he_wants_to_prepare_identical_platters_without_having_any_cake_left_over,_what_is_the_greatest_number_of_platters_he_can_prepare?

Question 7 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Sean_has_8-inch_pieces_of_toy_train_track_and_Ruth_has_18-inch_pieces_of_train_track._How_many_of_each_piece_would_each_child_need_to_build_tracks_that_are_equal_in_length?

Question 8 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_radio_station_gave_away_a_$100_bill_for_every_100th_caller._Every_30th_caller_received_free_concert_tickets._How_many_callers_must_get_through_before_one_of_them_receives_both_a_coupon_and_a_concert_ticket?

Question 9 (of 10)

 


Is it GCF or LCM?: QR Challenge

https://www.classtools.net/QR/decode.php?text=Mrs._Evans_has_120_crayons_and_30_pieces_of_paper_to_give_to_her_students._What_is_the_largest_number_of_students_she_can_have_in_her_class_so_that_each_student_gets_equal_number_of_crayons_and_equal_number_of_paper?

Question 10 (of 10)