A Fox, a Goose, and a Bag of Beans Logic Riddle

A Fox, a Goose, and a Bag of Beans Logic Riddle

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Project Name: A Fox, a Goose, and a Bag of Beans Logic Riddle Students are given 3D models to act out and try to solve a famous logic riddle about a goose, a fox, and a bag of beans. They are then shown a clip from The Simpsons that is a parody of this riddle. Print Settings Printer Brand: MakerBot Printer: MakerBot Replicator Rafts: Yes Supports: No Resolution: standard Infill: 10% How I Designed This I measured the circumference of my pointer and ring fingers, then used the formula to get the diameters of the circular holes needed to fit through. The size of these holes can be changed to match student's fingers, or left a little big for a more relaxed fit. I designed the base with a rectangle and cylinder holes in Tinkercad. The bean bag was added using the cylinder and adding letters on top. The fox, goose, and farmer were hand drawn and scanned. I then converted them to SVG files and imported them into Tinkercad. Standards CCSS.Math.Practice.MP1 Make sense of problems and persevere in solving them. Overview and Background Overview & Background: Students will get practice problem-solving. Objectives: Students will use their problem-solving skills. According to Susanna Epp, author of Discrete Mathematics with Applications, solving these types of puzzles will help develop a sense for the flow of deductive reasoning students will use later in mathematical proofs of all types. Skills Learned (Standards): CCSS.Math.Practice.MP1 Make sense of problems and persevere in solving them. Audiences: There is no math background required for this activity, so it can be used at any time, probably starting in middle school and up. One suggestion is to use this as a first day of school activity to get students back to thinking about math, but in a fun way. Lesson Plan and Activity Step 1: Explain the riddle. A farmer goes to market and buys a fox, a goose, and a bag of beans. To get home, the farmer has to cross a river in a boat that can only hold himself plus one other item. Left alone, the fox would eat the goose, and the goose would eat the bag of beans. The goal is to figure out how the farmer can get everything across safely. Step 2: In groups of four, ask students to solve this riddle. Students should be given the models to act out the situation as they try to solve the riddle. One solution is for the farmer to first take the goose to the other side. Next, he returns and brings the fox over. On the next return, he brings the goose with him. Then he takes the bag of beans to the other side and returns. Finally, he brings the goose back over. Step 3: Once a group has a solution, ask them if there are other solutions. One variation is to switch the roles of the fox and the bag of beans. Step 4: Have groups share their solution. Ask them why it is necessary for the goose to be brought over first. Essentially, it works out this way because the goose can't be left alone with either the fox or the beans. Step 5: Show students a clip from The Simpsons where Homer needs to cross a river in a boat that can only carry two items at a time. He has to figure out how to get everyone safely across. Step 6: Have students figure out how this is equivalent to the previous riddle. To solve Homer's riddle, he first takes Maggie over to the other side. Then he returns and brings the poison over. He brings Maggie back to the other side and brings Santa's Little Helper across. Finally, he returns and brings Maggie back over. Duration of Lesson This activity will take around 25 minutes. Preparation Students don't need any background knowledge to do this activity. Rubric and Assessment This activity can be done without an assessment or can count for a participation grade. Question (points) Participation in solving the riddle (7) Participation in presenting solution (3) Total 10

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