2016
2017
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2017
|
The New Year Challenge
|
Algebra
|
January 2017
|
Math Before Breakfast
|
Algebra
|
January 2017
|
Year Without Brackets
|
Algebra
|
|
|
|
February 2017
|
The Telephone Number
|
Algebra
|
February 2017
|
Cowboy Puzzler
|
Algebra
|
February 2017
|
A Painted House
|
Algebra
|
|
|
|
March 2017
|
String Problem
|
Algebra
|
March 2017
|
Rectangular Parallelepiped Problem
|
Algebra, Geometry
|
March 2017
|
Street Closure Problem
|
Logic
|
|
|
|
April 2017
|
Lock Problem
|
Logic
|
April 2017
|
Area Problem
|
Algebra, Geometry
|
April 2017
|
Clock Problem
|
Logic
|
|
|
|
May 2017
|
Three Walkers
|
Algebra
|
May 2017
|
College Math
|
Algebra
|
May 2017
|
The Three Thieves
|
Algebra
|
|
|
|
June 2017
|
As Easy As A, B, ...
|
Arithmetic
|
June 2017
|
The Three Thieves (Part 2)
|
Algebra
|
June 2017
|
The Lock Problem (Part 2)
|
Algebra
|
|
|
|
July 2017
|
Prime Time
|
Arithmetic, Logic
|
July 2017
|
CalcuDoku
|
Algebra
|
July 2017
|
Game Devisers
|
Logic
|
|
|
|
August 2017
|
Balanced Equations
|
Algebra, Logic
|
August 2017
|
Cinematic Conversions
|
Logic, Arithmetic
|
August 2017
|
Petite Circle-Sum Walkthrough
|
Logic, Arithmetic
|
|
|
|
September 2017
|
Mr. P's Grandchildren
|
Algebra
|
September 2017
|
NFL Wackie Wordies
|
Logic
|
September 2017
|
A Radical Equation
|
Algebra
|
|
|
|
October 2017
|
Generosity after the Hurricanes
|
Arithmetic, Algebra
|
October 2017
|
Russian Army motorcyclists
|
Geometry
|
October 2017
|
Another A and B problem
|
Algebra
|
|
|
|
November 2017
|
Addition Problem
|
Logic, Arithmetic
|
November 2017
|
Picture Magic Square
|
Logic, Algebra
|
November 2017
|
Blowin' in the Wind
|
Algebra
|
|
|
|
December 2017
|
Christmas Tree Puzzle
|
Algebra
|
December 2017
|
Math Art
|
Logic
|
December 2017
|
Meet 16
|
Algebra
|
2018
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2018
|
The New Year Challenge
|
Algebra
|
January 2018
|
New Year Magic Square
|
Logic, Arithmetic
|
January 2018
|
2018 Multiplication Problem
|
Logic, Arithmetic
|
|
|
|
February 2018
|
David Jones' Locker
|
Logic, Arithmetic
|
February 2018
|
Two-Player Game
|
Logic, Arithmetic
|
February 2018
|
De Morgan's Age Problem
|
Logic, Arithmetic
|
|
|
|
March 2018
|
Super Bowl Party Game
|
Logic, Arithmetic
|
March 2018
|
Women's Basketball Polls
|
Logic, Arithmetic
|
March 2018
|
Moving Walkways
|
Logic
|
|
|
|
April 2018
|
April Fools
|
Logic, Arithmetic
|
April 2018
|
Cross Number Puzzle
|
Logic, Arithmetic
|
April 2018
|
Top Ten Colleges
|
Logic
|
|
|
|
May 2018
|
Isosceles Triangle Problem
|
Algebra
|
May 2018
|
Math Scramble
|
Logic
|
May 2018
|
World Tour
|
Logic
|
|
|
|
June 2018
|
As Easy As A + B + C
|
Algebra
|
June 2018
|
As Easy As Pi
|
Algebra
|
June 2018
|
Skyscrapers
|
Logic
|
|
|
|
July 2018
|
Distance Problem
|
Geometry
|
July 2018
|
Loco Sudoku
|
Logic
|
July 2018
|
Dividing the Spoils
|
Algebra
|
|
|
|
August 2018
|
Cross Math Puzzle
|
Algebra, Logic
|
August 2018
|
What Fraction?
|
Geometry
|
August 2018
|
Three Lighthouses
|
Logic
|
|
|
|
September 2018
|
Mr. P's Phone Number
|
Arithmetic, Logic
|
September 2018
|
MOD Pizza
|
Algebra, Geometry
|
September 2018
|
Geometric Shapes Search
|
Geometry
|
|
|
|
October 2018
|
Missing Mathematicians
|
Logic
|
October 2018
|
The 416 Fire
|
Arithmetic, Logic
|
October 2018
|
Chess Puzzler (5 pieces)
|
Logic
|
|
|
|
November 2018
|
Four Digit Number Trick
|
Arithmetic, Logic
|
November 2018
|
SUMOKU
|
Arithmetic, Logic
|
November 2018
|
Change for a (half) Dollar
|
Arithmetic, Logic
|
|
|
|
December 2018
|
Christmas Tree Puzzle
|
Algebra
|
December 2018
|
Mince Pies
|
Logic
|
December 2018
|
Sum and Product
|
Algebra
|
2019
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2019
|
The New Year Challenge
|
Algebra
|
January 2019
|
Chess Puzzler (8 Queens)
|
Logic
|
January 2019
|
Boeing 747
|
Arithmetic
|
|
|
|
February 2019
|
Bucket Problem
|
Arithmetic, Logic
|
February 2019
|
Stewart's Birthday Cake
|
Geometry, Algebra
|
February 2019
|
Math Doublets
|
Logic
|
|
|
|
March 2019
|
Elephant Drinking Problem
|
Arithmetic
|
March 2019
|
Jersey Pi Problem
|
Logic
|
March 2019
|
Scrabble Squares
|
Arithmetic, Logic
|
|
|
|
April 2019
|
Laying Eggs
|
Logic
|
April 2019
|
Easter Word Cross
|
Logic
|
April 2019
|
Easter Egg Hunt
|
Algebra
|
|
|
|
May 2019
|
Bucket Problem #2
|
Geometry
|
May 2019
|
Trading in the Philippines
|
Arithmetic, Logic
|
May 2019
|
Longfellow's Bees
|
Algebra
|
|
|
|
June 2019
|
Family Age Problem
|
Algebra
|
June 2019
|
The monk and the bridges
|
Logic
|
June 2019
|
TV Viewing Distance
|
Algebra, Geometry
|
|
|
|
July 2019
|
Dividing Apples
|
Logic
|
July 2019
|
Money Problems
|
Algebra
|
July 2019
|
Prison Problem
|
Logic
|
|
|
|
August 2019
|
Insulin Pen
|
Logic
|
August 2019
|
Fill in the Squares
|
Logic
|
August 2019
|
The Envelope Problem
|
Logic, Arithmetic
|
|
|
|
September 2019
|
NFL Passer Rating
|
Algebra
|
September 2019
|
Dice Roulette
|
Probability
|
September 2019
|
Easy as 1, 2, 3!
|
Algebra
|
September 2019
|
Corporate Greed in America
|
Arithmetic
|
|
|
|
October 2019
|
How Old is the Boss?
|
Algebra
|
October 2019
|
The Spider and the Fly
|
Geometry
|
October 2019
|
Skyscrapers Part 2
|
Logic
|
|
|
|
November 2019
|
The Rocky Mountain Lobos
|
Algebra
|
November 2019
|
Prime Choices
|
Logic, Arithmetic
|
November 2019
|
Number Trick
|
Algebra
|
|
|
|
December 2019
|
Christmas Tree Puzzle
|
Algebra
|
December 2019
|
As Easy as A, B, and C
|
Algebra
|
December 2019
|
Kopek Problem
|
Logic
|
2020
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2020
|
The New Year Challenge
|
Algebra
|
January 2020
|
Mathematical Roundabouts
|
Logic
|
January 2020
|
The Odometer Puzzle
|
Algebra
|
|
|
|
February 2020
|
Train Meeting
|
Algebra
|
February 2020
|
Decoding Messages
|
Logic
|
February 2020
|
C.S.U. Volleyball
|
Algebra
|
February 2020
|
Mass Shootings in 2019
|
Arithmetic
|
|
|
|
March 2020
|
Food Bank Truck
|
Algebra
|
March 2020
|
Calculus Tag-A-Long
|
Calculus, Logic
|
March 2020
|
Test Problems
|
Algebra
|
|
|
|
April 2020
|
Letter By Letter
|
Logic
|
April 2020
|
Math Fill Ins
|
Logic, Math Definitions
|
April 2020
|
Coronavirus in Colorado
|
Algebra, Precalculus
|
|
|
|
May 2020
|
Parking Problem
|
Algebra
|
May 2020
|
Pentagon Problem
|
Geometry
|
May 2020
|
Getting from A to B
|
Logic
|
|
|
|
June 2020
|
Different Rectangles Part 1
|
Logic
|
June 2020
|
Numbrix
|
Logic
|
June 2020
|
8 Easy Equations
|
Algebra
|
|
|
|
July 2020
|
Different Rectangles Part 2
|
Logic
|
July 2020
|
Arby's Coupons
|
Logic
|
July 2020
|
SUM-THING MISSING
|
Logic
|
|
|
|
August 2020
|
Different Rectangles Part 3
|
Logic
|
August 2020
|
The Prayer Circle Problem
|
Geometry, Trigonometry
|
August 2020
|
How Many Pages?
|
Logic, Arithmetic
|
|
|
|
September 2020
|
Presidential Golf
|
Arithmetic
|
September 2020
|
Dividing the Meal
|
Logic, Arithmetic
|
September 2020
|
Numbers Puzzle
|
Logic, Arithmetic
|
September 2020
|
A Biblical Treasure Hunt
|
Algebra, Geometry, Trig, Logic
|
|
|
|
October 2020
|
Five Digits
|
Logic, Arithmetic
|
October 2020
|
Smallest Integer
|
Logic, Algebra
|
October 2020
|
Hiroimono
|
Logic
|
October 2020
|
Trump's False Statements
|
Algebra
|
|
|
|
November 2020
|
Filling A Cistern
|
Algebra
|
November 2020
|
Your (Math) Word Against Mine
|
Logic
|
November 2020
|
Political Arithmetic
|
Algebra
|
November 2020
|
RR Bridge Part 1
|
Logic, Prealgebra
|
|
|
|
December 2020
|
Holiday Trip
|
Logic
|
December 2020
|
Wrapping Paper Problem
|
Calculus
|
December 2020
|
Decode a message
|
Logic, Magic Squares
|
December 2020
|
RR Bridge Part 2
|
Algebra
|
December 2020
|
A Christmas Message
|
Algebra
|
|
|
|
2021
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2021
|
The New Year Challenge
|
Logic, Algebra
|
January 2021
|
Interesting Sums
|
Logic
|
January 2021
|
Knight Life
|
Logic, Chess
|
January 2021
|
Pythagorean Theorem Days
|
Logic, Geometry
|
January 2021
|
A problem from Bhaskara's Lilavati
|
Algebra
|
|
|
|
February 2021
|
Hiroimono Part 2
|
Logic
|
February 2021
|
Math Boggle
|
Logic
|
February 2021
|
NBA Playoff
|
Logic, Algebra
|
February 2021
|
Prime Clock
|
Logic, Algebra
|
|
|
|
March 2021
|
Pie Thoughts
|
Logic
|
March 2021
|
Chess Problem
|
Statistics
|
March 2021
|
Arithmetic Sequences
|
Algebra, Logic
|
March 2021
|
Magic Circles
|
Logic
|
|
|
|
April 2021
|
Pool Problem
|
Geometry
|
April 2021
|
COVID-19 Deaths
|
Arithmetic
|
April 2021
|
Easter Egg Hunt
|
Logic
|
April 2021
|
Place Setting Problem
|
Algebra
|
April 2021
|
Snowtime in Colorado
|
Algebra, Geometry
|
|
|
|
May 2021
|
Friends in Far Places
|
Logic
|
May 2021
|
Go Jump in the Lake
|
Geometry
|
May 2021
|
Sequence Problem
|
Algebra
|
May 2021
|
Geometry Problem
|
Geometry
|
|
|
|
June 2021
|
Apartments
|
Logic
|
June 2021
|
Mr. P and his grandson
|
Logic
|
June 2021
|
Big Number Problem
|
Logic
|
June 2021
|
Consecutive Fibonacci Numbers
|
Algebra
|
June 2021
|
Sooley Problem
|
Algebra
|
|
|
|
July 2021
|
Dots in a grid
|
Geometry
|
July 2021
|
Money Problem
|
Algebra
|
July 2021
|
Oxford Problem
|
Algebra
|
July 2021
|
Trains
|
Logic
|
|
|
|
August 2021
|
Carpenty Problem
|
Logic, Algebra
|
August 2021
|
Mystery Numbers
|
Logic
|
August 2021
|
Triangle Problem
|
Logic, Geometry, Calculus
|
August 2021
|
Inner Circles
|
Logic
|
|
|
|
September 2021
|
Circle Problem
|
Geometry
|
September 2021
|
Square Problem
|
Algebra, Geometry
|
September 2021
|
Egg Problem
|
Algebra
|
September 2021
|
Window Problem
|
Algebra, Geometry
|
|
|
|
October 2021
|
What's the Angle?
|
Geometry
|
October 2021
|
Travel Problem
|
Algebra
|
October 2021
|
Was It A Cat I Saw?
|
Logic
|
October 2021
|
Cross Math Puzzle
|
Logic, Arithmetic
|
|
|
|
November 2021
|
Math Blocks
|
Logic
|
November 2021
|
Blackjack Balancing Act
|
Logic, Algebra
|
November 2021
|
Tiling Problem
|
Algebra, Geometry
|
November 2021
|
Too Many Choices
|
Algebra
|
|
|
|
December 2021
|
Christmas Message
|
Algebra
|
December 2021
|
Carom Billiard Table
|
Algebra, Logic
|
December 2021
|
The Smaller Number
|
Algebra
|
December 2021
|
Christmas Word Cross
|
Logic
|
|
|
|
2022
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2022
|
The New Year Challenge
|
Logic, Algebra
|
January 2022
|
Incenter of a Triangle
|
Geometry
|
January 2022
|
Square Routes
|
Logic
|
January 2022
|
1876 M.I.T. Exam question
|
Algebra
|
|
|
|
February 2022
|
Math Blocks Part 2
|
Logic
|
February 2022
|
Pepper Problem
|
Logic, Algebra
|
February 2022
|
Truth Tellers and Liars
|
Logic
|
February 2022
|
Tile Problem
|
Geometry, Algebra
|
|
|
|
March 2022
|
Venn Diagram Mystery
|
Logic
|
March 2022
|
Dirty Dozen Balancing Act
|
Logic, Algebra
|
March 2022
|
Number Problem
|
Algebra
|
March 2022
|
Celebrations in India
|
Logic
|
|
|
|
April 2022
|
Rectangle Problem
|
Algebra, Geometry
|
April 2022
|
Cable Search
|
Logic
|
April 2022
|
Magic Hexagon
|
Logic, Arithmetic
|
April 2022
|
Digits Problem from 1915
|
Algebra
|
|
|
|
May 2022
|
Square Root Problem
|
Algebra
|
May 2022
|
Magic Square
|
Algebra
|
May 2022
|
Tic Tac Toe -- Math Style
|
Logic
|
May 2022
|
Goat Grazing by Gazebo
|
Geometry, Trigonometry
|
|
|
|
June 2022
|
Time the Two Skaters
|
Algebra
|
June 2022
|
Alphabetical Numbers
|
Logic
|
June 2022
|
Divisible by 7
|
Algebra
|
June 2022
|
Ladder Problem
|
Geometry
|
|
|
|
July 2022
|
The Tortoise and the Hare
|
Algebra
|
July 2022
|
Banneker's Cattle Problem
|
Algebra
|
July 2022
|
Jean and Jane
|
Logic
|
July 2022
|
July 4th Parade
|
Logic
|
|
|
|
August 2022
|
OSLO
|
Logic
|
August 2022
|
Fill the Bucket
|
Algebra
|
August 2022
|
Triangle Problem
|
Geometry
|
August 2022
|
Cat and Turtle on a Table
|
Algebra
|
|
|
|
September 2022
|
FoCo Traffic Problem
|
Logic
|
September 2022
|
Ten Circles in a "Pyramid"
|
Geometry
|
September 2022
|
Bat and Ball
|
Algebra
|
September 2022
|
Goal Post Multiplication
|
Arithmetic, Logic
|
|
|
|
October 2022
|
Cross Math Puzzle
|
Logic, Arithmetic
|
October 2022
|
Zero Power
|
Algebra
|
October 2022
|
Hot Air Balloon
|
Geometry
|
October 2022
|
Pumpkin Patch Problem
|
Geometry, Algebra
|
|
|
|
November 2022
|
Basketball Problem
|
Logic, Arithmetic
|
November 2022
|
Carol Pleacher
|
Algebra
|
November 2022
|
Mean / Median
|
Algebra
|
November 2022
|
Number Cross Sums
|
Logic
|
|
|
|
December 2022
|
Sum Christmas Trees
|
Logic, Arithmetic, Algebra
|
December 2022
|
The Island People
|
Logic
|
December 2022
|
1,000 Lamps
|
Logic, Algebra
|
December 2022
|
FORTY + FIFTY + ZERO + ZERO = NINETY
|
Logic, Algebra
|
2023
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2023
|
The New Year Challenge
|
Logic, Algebra
|
January 2023
|
Minimum Wage
|
Arithmetic
|
January 2023
|
MYTH: MATH IS HARD
|
Arithmetic, Logic
|
January 2023
|
Bicycle Helmets
|
Probability
|
|
|
|
February 2023
|
Mean, Median, Mode
|
Arithmetic, Logic, Statistics
|
February 2023
|
Four Cars
|
Algebra, Logic
|
February 2023
|
Book Problem
|
Algebra, Logic
|
February 2023
|
The number 201
|
Algebra, Logic
|
|
|
|
March 2023
|
Pie Eaters
|
Algebra
|
March 2023
|
Green Eggs and Ham
|
Arithmetic, Logic
|
March 2023
|
Number Cross Sums
|
Arithmetic, Logic
|
March 2023
|
Mathematical Wackie Wordies
|
Logic
|
|
|
|
April 2023
|
Return of the Island People
|
Logic
|
April 2023
|
Pen Problem
|
Algebra
|
April 2023
|
Three zeros
|
Logic, Arithmetic
|
April 2023
|
How Many Oranges?
|
Logic, Algebra
|
|
|
|
May 2023
|
World Cup Soccer
|
Logic
|
May 2023
|
Digit Problem
|
Algebra, Logic
|
May 2023
|
Locker Problem
|
Algebra, Logic
|
May 2023
|
47 Counters
|
Algebra, Logic
|
|
|
|
June 2023
|
How far did Jonah drive?
|
Algebra
|
June 2023
|
31 Students
|
Logic
|
June 2023
|
Window Problem
|
Arithmetic
|
June 2023
|
Box in a sphere
|
Geometry
|
|
|
|
July 2023
|
Book Problem
|
Algebra
|
July 2023
|
Ordered Triples Problem
|
Algebra
|
July 2023
|
Circle Problem
|
Geometry
|
July 2023
|
Locker Problem
|
Algebra, Logic
|
|
|
|
August 2023
|
Hidden Math Words
|
Logic
|
August 2023
|
Painted Cube Problem
|
Geometry
|
August 2023
|
Magic Square
|
Algebra
|
August 2023
|
Whose sum is correct?
|
Algebra
|
|
|
|
September 2023
|
Daffy Definitions
|
Logic
|
September 2023
|
Trapezoidal Problem
|
Geometry
|
September 2023
|
Mr. P Problem
|
Logic
|
September 2023
|
The Girard And de Marco Families
|
Logic
|
|
|
|
October 2023
|
Odd Letter Out
|
Logic
|
October 2023
|
Hex Path
|
Logic
|
October 2023
|
Mailbox Numbers
|
Logic
|
October 2023
|
How Old are the Daughters?
|
Logic
|
|
|
|
November 2023
|
Bo, Jo, Mo, and Flo
|
Algebra
|
November 2023
|
Weight Loss Problem
|
Algebra
|
November 2023
|
What's My Number?
|
Logic
|
November 2023
|
Company Gift
|
Algebra
|
|
|
|
December 2023
|
Christmas Phobias
|
Logic
|
December 2023
|
Christmas Wackie Wordies
|
Logic
|
December 2023
|
Sum More Christmas Trees
|
Arithmetic, Logic
|
December 2023
|
Who is leading Santa's Sleigh?
|
Logic
|
|
|
|
2024
Date
|
Name of Problem of the Month
|
Math Needed
|
January 2024
|
The New Year Challenge
|
Logic, Algebra
|
January 2024
|
Mid Loop
|
Logic
|
January 2024
|
2004 Super Bowl
|
Logic, Arithmetic
|
January 2024
|
Golf with Tiger Woods
|
Algebra II
|
|
|
|
February 2024
|
Chess Tournament
|
Logic, Probability
|
February 2024
|
Washington Monument Baseball Problem
|
Calculus
|
February 2024
|
Ten Mile Hike
|
Algebra II
|
February 2024
|
Lucky Numbers
|
Logic
|
|
|
|
March 2024
|
Pi Problem
|
Logic
|
March 2024
|
Circle Problem
|
Algebra
|
March 2024
|
Logarithm Problem
|
Algebra II
|
March 2024
|
Puzzle Shop Puzzle
|
Logic
|
|
|
|
April 2024
|
Six Coins, Three Ways
|
Logic, Arithmetic
|
April 2024
|
4 x 4 Square
|
Logic
|
April 2024
|
How Far Can You See?
|
Geometry
|
April 2024
|
Who Am I?
|
Logic, Arithmetic
|
|
|
|
May 2024
|
Can you break the code?
|
Logic, Arithmetic
|
May 2024
|
Center of a Cube
|
Geometry
|
May 2024
|
The Fantastic Formula
|
Algebra
|
May 2024
|
Horses and Chickens
|
Algebra or logic
|
|
|
|
June 2024
|
Colorado Temperature Change
|
Algebra
|
June 2024
|
Five Numbers
|
Algebra
|
June 2024
|
From American Somoa to Fiji
|
Logic
|
June 2024
|
Knights and Liars
|
Logic
|
|
|
|
July 2024
|
SUM Things to ponder
|
Logic, Arithmetic
|
July 2024
|
Pretzel Problem
|
Logic, Algebra
|
July 2024
|
Tetrahedron Problem
|
Geometry, Algebra
|
July 2024
|
Where do the Magicians Rank?
|
Logic
|
|
|
|
August 2024
|
Special Birthday Card
|
Algebra
|
August 2024
|
Which Way to Jubilee?
|
Logic
|
August 2024
|
Prime Time Soccer
|
Logic, Arithmetic
|
August 2024
|
Boxes of Red and Blue Balls
|
Logic, Arithmetic
|
|
|
|
September 2024
|
Cleaning up the Yard
|
Algebra, Logic
|
September 2024
|
Midnight and Mr. P
|
Algebra, Logic
|
September 2024
|
Soccer Standings
|
Logic
|
September 2024
|
Tom, Dick, and Harry
|
Logic
|
|
|
|
October 2024
|
Math Path
|
Arithmetic, Logic
|
October 2024
|
How Tall is That?
|
Arithmetic
|
October 2024
|
Olympic Games
|
Logic
|
October 2024
|
Another Chicken Nuggets Problem
|
Logic, Arithmetic
|
|
|
|
November 2024
|
Dave and Carol
|
Logic
|
November 2024
|
Urim and Thummim
|
Probability
|
November 2024
|
No Hunting!
|
Geometry
|
November 2024
|
Sequence Problem
|
Algebra
|
|
|
|
December 2024
|
Sum Christmas Trees
|
Logic, Algebra
|
December 2024
|
Regions in a Circle
|
Geometry
|
December 2024
|
The Devil and Daniel Webster
|
Arithmetic
|
December 2024
|
The Diamond Tree Challenge
|
Logic
|
|
|
|
2025
|