PUZZLES

Math puzzles for all ages and skill levels.

JRMF puzzles are unique compared to other math games you’ll find. We design problems with low-floors so everyone can get started by the simple act of trying something and with high-ceilings that lead to challenging mathematics.

Play them in person with friends, or virtually at home.

4th and Up Number
Chameleon Island
Chameleon Island
Help all the chameleons on the island change into the same color.
4th and Up Number
Countdown
Countdown
Be the player to take the last token!
4th and Up Logic
Cup Stacking
Cup Stacking
Can you find a way to stack every cup?
4th and Up Shape
Gerrymandering
Gerrymandering
Learn how gerrymandering can be used to control elections by practicing gerrymandering yourself!
4th and Up Number
Graceful Gourds
Graceful Gourds
Can you gracefully label these pumpkin patches?
4th and Up Number
Ladybugs
Ladybugs
Help as many ladybugs as possible land on the leaves.
4th and Up Shape
Lots o’ Plots
Lots o’ Plots
Fill your entire garden with plots of carrots.
4th and Up Number
Magic Flowers
Magic Flowers
Can you arrange 5 numbers into a Magic Flower in which every group of three numbers in a line adds up to the same magic number?
4th and Up Number
Prime Cubes
Prime Cubes
Armed with only your understanding of prime numbers, play against your friends to find the best way to fill in our colorful cube.
4th and Up Logic
Rook’s Move
Rook’s Move
Race your friends to get the rook to the end of the chessboard. Can you find a way to win every time?
4th and Up Logic
Skyscrapers
Skyscrapers
Help the city planner build up the city with new skyscrapers.
4th and Up Shape
Smileys
Smileys
Smiling is contagious! Can you turn every frown upside down?
4th and Up Logic
Sprigs
Sprigs
Take turns drawing curves to connect dots. Can you be the one to draw the last curve?
4th and Up Logic
Star Battle
Star Battle
Can you place the stars on the grid?