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# Puzzles

Try these puzzles yourself or with your students!

PUZZLES

Fraction Stretch!

Fraction Stretch is an interactive fraction puzzle that has deep connections to other mathematical ideas.  The premise? Two fraction bars are mislabeled.  Your job is to stretch and shrink them until they are correctly labeled.  Ideal for 5th or 6th grade, but can be used with all of K-12.  It’s that rich!

PUZZLES

Triangle Perimeter

In this puzzle, your job is to minimize the perimeter of a triangle under very specific constraints.  Can you prove it?

PUZZLES

Matrix Bullet Dodge

Write functions.  Dodge bullets.  Help Neo avoid getting clipped by rotating his body away from the bullets.

PUZZLES

Rubber Band Perimeter

In this interactive puzzle, try to stretch a digital rubber band to make a perimeter of 24.  Can you find a way to do it with 7 vertices?

PUZZLES

Three Rotations

This is an open-ended puzzle that asks you to find rotations that pass through a given point 3 times.  Bonus points for creativity!

PUZZLES

Rubber Band Area

In this puzzle a rotating arm stretches the sides of a square.  Your job?  Try to write a function that outputs the area as the arm revolves!

PUZZLES

Ripple Functions

Quite possibly the most satisfying function modeling task in the world.  Design functions that guide a circle over emanating ripples.