## 3-1-4 Pi Day Number Challenge

This 3-1-4 Number Challenge is the perfect way to challenge your brain on Pi Day! How many different numbers can you come up with mathematical expressions for using only the digits 3, 1, and 4? Instructions Use the digits 3, 1, and 4 exactly one time each along with any mathematical symbol or operation of …

## Fours Challenge Puzzle

Can you solve the Fours Challenge? Can you use exactly four fours and your choice of arithmetical symbols to form the target numbers? What is the Fours Challenge? Using exactly four fours, add arithmetical symbols between the fours to make each of the target numbers. You may use plus, minus, times, and divide symbols, as …

## 2023 Challenge: Yearly Number Challenge

The yearly number challenge is a simple to explain puzzle that will keep you captivated for hours. Using the digits in the current year exactly one time each, can you write a mathematical expression for each digit between 1 and 100? You may use any mathematical symbol or operation of your choosing. What is the …

## Threes Challenge

Can you solve the Threes Challenge? Can you use exactly four threes and your choice of arithmetical symbols to form the target numbers? What is the Threes Challenge? Using exactly four threes, add arithmetical symbols between the threes to make each of the target numbers. You may use plus, minus, times, and divide symbols, as …

## Twos Challenge

Can you solve the Twos Challenge? Can you use exactly four twos and your choice of arithmetical symbols to form the target numbers? Even though Twosday (2/22/22) was nine months ago, I still have lots of blog traffic to the Twosday Challenge. I decided it was time to share a version of the challenge that …

## 25 Fun Geometry Puzzles

Looking for fun and engaging geometry puzzles? Here is a collection of 25 free printable geometric puzzles that I have used in the past with my high school math students. Most of these puzzles should be appropriate to use with individuals ranging in age from upper elementary school or middle school to adults. My students’ …

## Twosday Challenge Activity

This Twosday Challenge is the perfect way to infuse a bit of mathematical fun on an upcoming mathematical holiday – Twosday! What is Twosday? Twosday is the name being given to Tuesday, February 22, 2022 since the date will be written as 2/22/22 in the US and 22/2/22 in much of the rest of the …

## Sankaku Puzzles

Sankaku puzzles are a geometric based logic puzzle that focuses on finding the area of a triangle. The goal of each puzzle is to connect three dots to form a triangle with the specified area. Sankaku puzzles are the creation of Naoki Inaba, a prolific Japanese puzzle creator. I first discovered these puzzles several years …

## Make 30 Puzzles

I’ve been having a lot of fun recently posting these Make 30 Puzzles for my students to tackle on a daily basis. The goal of these Make 30 puzzles is to arrange the digits and any of the arithmetic operations to form an expression that evaluates to 30. For example, the digits 0, 2, and …

## Tricky Triangles Puzzle

This tricky triangles puzzle has been around for over a century – can you arrange these eight sticks to form exactly four triangles and two squares? The original puzzle was meant to be solved with matchsticks, but I don’t think I need to explain why I won’t be giving my students matchsticks to play with… …