## 100 Days of Puzzles

Challenging puzzles using logic, algebra, geometry, probability, and number theory. Do one puzzle a day for 100 days!

The Heavier Side

Count the Werewolves

Carrrs

Checkered Cubes

In Order or All at Once?

Find the Best Deal

Shaded Stars

Where's the Gold?

The Nine Nine Plus

Save Your Calculator

Venn Rectangles

On a Roll

A Lil Goes a Long Way

Striking Measure

Where Can You Subtract?

Compare the Weights

How Hard Is It to Measure a Skyline?

Advances in Wolf Fence Design

How Did They Finish?

Not Divisible

Stack of Squares

In the Cards

Two Wrongs Make a Right

Werewolves Are Liars

There Are More Than Four Triangles!

How Much Faster Together?

The Star Area

Who is the Fastest Sprinter?

The Best Candidate

One More Flip

Inner and Outer Angles

Rearrange the Dots Again

Sock Hop

Go for the Gold

One to Nine

Fill the Diagonal

Pigeonholed Numbers

Did You Miss Any?

Two Triangles, One Trapezoid

Wandering Robots

Ha ha ha ha! Eh...

Draw the Line

Fill the Grid

Where Is the Gold?

Keep Coloring Forever

Should You Stop Rolling?

The Brilliant Hotel

Fish Fictions

Can You Make It Bigger?

There's a Quick Solution

Gears and Ants

How Many Werewolves?

Impossible Result

Add Up to Odd

Triangles in Line

Dice Wars

Different Numbers

Piece of a Circle

Crack the Code!

Running Round in Circles

Does It Change?

Stylish Socks

Can You Find Them All?

Red or Blue?

Human or Werewolf?

Only Multiply or Divide!

How Many Ways to Fill the Grid?

Yellow Plus Blue

Coins in Boxes

Largest and Smallest

Does It Make a Cube?

Start in the Middle

Parallelogram and Circles

Misleading Marathoners

How Many Marbles?

Make Six Twice

Which Has More Faces?

How Much Will You Win?

Overlapping Areas

Taking Their Time

Diagonal Thinking

Knight, Knave, or Joker?

Cherry Production

Angle Hunt

The Short Pour

Exactly 3 Divisors?

Overlapping Rectangles

Shopping for Socks

String the Tiles Together

Humans and Werewolves

Only Two Pieces?

The Eye of...

What Makes Squares a Little Odd?

Perimeter from Perimeters?

Random Numbers

Too Many Twos

Octagons and Squares

What Color is Shinoy's Hat?

Elephant Ears

The Maximum Maximum

### Course description

A 100-day puzzle-a-day challenge! Topics include: logic, algebra, geometry, probability, and number theory.