201718 Problem of the Week Calendar
Links to the Packets, suggested Activity Series strategies, and Online Resources (and more!) are available from the individual problem page (linked from the titles below). Access to the problems is restricted to users who have subscribed to one of our membership services.
Mentor groups (indicated by ) make it possible for more students to receive free mentoring than is normally possible. This list is updated throughout the year.
* Students can submit to problems any time after they open. However, only solutions submitted before the next problem opens will be considered for inclusion in the posted solutions for the Math Fundamentals, PreAlgebra, Algebra, and Geometry problems.
Teachers with Full Memberships or higher can also view the problems from the 201617 academic year.
[ Primary  Math Fundamentals  PreAlgebra  Algebra  Geometry  Trig/Calc ]
Primary  
Submissions Open 
Problem  Mentor Group 

Aug 14  A Game of Dice  
Aug 28  Playing Cards  
Sep 11  At the Fair  
Sep 25  Color Competition  
Oct 9  Making Sandwiches  
Oct 23  Building a Fence  
Nov 6  Pretzel Riddle  
Nov 20  At the Grocery Store  
Dec 4  Getting Allowance  
Dec 18  Laying Carpet  
Jan 8  Prize Box  
Jan 22  Puppies for Sale  
Feb 5  Letter to Grandma  
Feb 19  Saul's Cupcakes  
Mar 5  Snack Time!  
Mar 19  A Trip to the Ballpark  
Apr 2  Pocket Money  
Apr 16  Problem 18  
Apr 30  Problem 19  
May 14  Problem 20  
Math Fundamentals  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Aug 21  Sharing Birthdays  Sep 8  
Sep 4  Chime Time  Sep 22  
Sep 18  Sports Weigh In  Oct 6  
Oct 2  A Pound of Tea  Oct 20  
Oct 16  Apple Inventory  Nov 3  
Oct 30  Subway Tokens  Nov 17  
Nov 13  Trapezoid Teatime  Dec 1  
Nov 27  Zoo Train  Dec 15  
Dec 11  Four Playful Mathematicians  Jan 5  
Jan 1  Fish in a Barrel  Jan 19  
Jan 15  Assembly Seating  Feb 2  
Jan 29  Nuts in a Bowl  Feb 16  
Feb 12  Pauline the Plumber  Mar 2  
Feb 26  California Dreaming  Mar 16  
Mar 12  Alien Operations  Mar 30  
Mar 26  Choosy Chooser's Choices  Apr 13  
Apr 9  LawnMowing Chore  Apr 27  
Apr 23  Problem 18  May 11  
May 7  Problem 19  May 25  
May 21  Problem 20  Jun 8  
PreAlgebra  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Aug 14  At Least a Mile  Sep 1  
Aug 28  Cork Costs  Sep 15  
Sep 11  Buying Cola  Sep 29  
Sep 25  Downloading Duel  Oct 13  
Oct 9  Apple Picking  Oct 27  
Oct 23  Pumpkin Carving for Charity  Nov 10  
Nov 6  Peeling Potatoes  Nov 24  
Nov 20  A Cranberry Craving  Dec 8  
Dec 4  Eight Squares on a Table  Dec 22  
Dec 18  A Snowy Driveway  Jan 12  
Jan 8  Which Coupon Is Better?  Jan 26  
Jan 22  Anjelica's Very Odd Magic Sweater  Feb 9  
Feb 5  Gearing Up  Feb 23  
Feb 19  Shortcut Savings  Mar 9  
Mar 5  Boxes of Stationery  Mar 23  
Mar 19  Ostrich Llama Count  Apr 6  
Apr 2  Kaytee's Contest  Apr 20  
Apr 16  Problem 18  May 4  
Apr 30  Problem 19  May 18  
May 14  Problem 20  Jun 1  
Algebra  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Aug 21  My Three Dogs  Sep 8  
Sep 4  Calendar Calculations  Sep 22  
Sep 18  Kristina's Code  Oct 6  
Oct 2  Baffling Brother  Oct 20  
Oct 16  What's the Difference?  Nov 3  
Oct 30  Splash!  Nov 17  
Nov 13  Dinner at Pepe's  Dec 1  
Nov 27  Time Trial Triumphs  Dec 15  
Dec 11  Heating the Tub  Jan 5  
Jan 1  To B or Not To B  Jan 19  
Jan 15  Sierpinski Stages  Feb 2  
Jan 29  Battle of the Bands  Feb 16  
Feb 12  Math Club Mystery  Mar 2  
Feb 26  Johnny's Orchards  Mar 16  
Mar 12  Splitting a Square  Mar 30  
Mar 26  What's the Temperature?  Apr 13  
Apr 9  Boxes of Cereal  Apr 27  
Apr 23  Problem 18  May 11  
May 7  Problem 19  May 25  
May 21  Problem 20  Jun 8  
Geometry  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Aug 14  Visiting Friends  Sep 1  
Aug 28  What's the Angle?  Sep 15  
Sep 11  Congruent Rectangles  Sep 29  
Sep 25  The Folding Ruler  Oct 13  
Oct 9  Square Segments  Oct 27  
Oct 23  Well, Well, Well  Nov 10  
Nov 6  Ants Marching  Nov 24  
Nov 20  Dendrochronology  Dec 8  
Dec 4  Similar Perimeter  Dec 22  
Dec 18  Arranging Rectangles  Jan 12  
Jan 8  How Long is the Base?  Jan 26  
Jan 22  Trisecting a Square  Feb 9  
Feb 5  Voulez Vous des Voussoirs?  Feb 23  
Feb 19  XXXXX  Mar 9  
Mar 5  A Picturesque Pythagorean Proof  Mar 23  
Mar 19  Triangle Transformation  Apr 6  
Apr 2  XXXXX  Apr 20  
Apr 16  Problem 18  May 4  
Apr 30  Problem 19  May 18  
May 14  Problem 20  Jun 1  
Trig/Calc  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Aug 21  Preparing for the Test  Sep 8  
Sep 4  Find the Function  Sep 22  
Sep 18  Is It a Midpoint?  Oct 6  
Oct 2  Up, Up, and Away (Part 1)  Oct 20  
Oct 16  Up, Up, and Away (Part 2)  Nov 3  
Oct 30  Can You Prove It?  Nov 17  
Nov 13  George's Gutters  Dec 1  
Nov 27  Skiing in Vermont  Dec 15  
Dec 11  Pie Puzzler  Jan 5  
Jan 1  A Rhyming Riddle  Jan 19  
Jan 15  Stonybrooke River Bridge  Feb 2  
Jan 29  The Growing Snowflake  Feb 16  
Feb 12  Adventure Airlines  Mar 2  
Feb 26  The Suspension Bridge  Mar 16  
Mar 12  Time to Make the Doughnuts  Mar 30  
Mar 26  Let Me Guess Your Number  Apr 13  
Apr 9  The Indoor Driving Range  Apr 27  
Apr 23  Problem 18  May 11  
May 7  Problem 19  May 25  
May 21  Problem 20  Jun 8  
* Students can submit to problems any time after they open. However, only solutions submitted before the next problem opens will be considered for inclusion in the posted solutions for the Math Fundamentals, PreAlgebra, Algebra, Geometry, and Trig/Calc problems.