201617 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. More information is available on our Pricing Guide.
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, Geometry, and Trig/Calc problems.
Teachers with Full Memberships or higher can also view the problems from the 201516 academic year.
[ Primary  Math Fundamentals  PreAlgebra  Algebra  Geometry  Trig/Calc ]
Primary  
Submissions Open 
Problem  Mentor Group 

Summer  
May 30  Ants on a Bun  
Jun 13  Bubblegum  
Jun 27  Counting Cars  
Jul 11  Fourth of July  
Jul 25  Goldfish Galore  
Aug 8  Ice Cream Party  
Aug 22  Soccer Madness  
Sep 5  Problem 2  
Sep 19  Problem 3  
Oct 3  Problem 4  
Oct 17  Problem 5  
Oct 31  Problem 6  
Nov 14  Problem 7  
Nov 28  Problem 8  
Dec 12  Problem 9  
Dec 26  Problem 10  
Jan 16  Problem 11  
Jan 30  Problem 12  
Feb 13  Problem 13  
Feb 27  Problem 14  
Mar 13  Problem 15  
Mar 27  Problem 16  
Apr 10  Problem 17  
Apr 24  Problem 18  
May 8  Problem 19  
May 22  Problem 20  
Math Fundamentals  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer  
Jun 6  Campfire Camaraderie  Jun 24  
Jun 20  A Larger Garden  Jul 8  
Jul 4  Pizza Dough  Jul 22  
Jul 18  Grampa Joe's Great Grandpets  Aug 5  
Aug 1  Cat Walk  Aug 19  
Aug 15  Charlene Goes Shopping  Sep 2  
Aug 29  MiniMall Measurements  Sep 16  
Sep 12  Problem 3  Sep 30  
Sep 26  Problem 4  Oct 14  
Oct 10  Problem 5  Oct 28  
Oct 24  Problem 6  Nov 11  
Nov 7  Problem 7  Nov 25  
Nov 21  Problem 8  Dec 9  
Dec 5  Problem 9  Dec 30  
Dec 19  Problem 10  Jan 13  
Jan 9  Problem 11  Jan 27  
Jan 23  Problem 12  Feb 10  
Feb 6  Problem 13  Feb 24  
Feb 20  Problem 14  Mar 10  
Mar 6  Problem 15  Mar 24  
Mar 20  Problem 16  Apr 7  
Apr 3  Problem 17  Apr 22  
Apr 17  Problem 18  May 5  
May 1  Problem 19  May 19  
May 15  Problem 20  Jun 2  
PreAlgebra  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer  
May 30  Lemonade Fun  Jun 17  
Jun 13  Counting Chicken Wings  Jul 1  
Jun 27  Train Travel  Jul 15  
Jul 11  Anh's Code  Jul 29  
Jul 25  Ducky Promenade  Aug 12  
Aug 8  3D Vision  Aug 26  
Aug 22  Baking Blackberries  Sep 9  
Sep 5  Problem 2  Sep 23  
Sep 19  Problem 3  Oct 7  
Oct 3  Problem 4  Oct 21  
Oct 17  Problem 5  Nov 4  
Oct 31  Problem 6  Nov 18  
Nov 14  Problem 7  Dec 2  
Nov 28  Problem 8  Dec 16  
Dec 12  Problem 9  Jan 8  
Dec 26  Problem 10  Jan 20  
Jan 16  Problem 11  Feb 3  
Jan 30  Problem 12  Feb 17  
Feb 13  Problem 13  Mar 3  
Feb 27  Problem 14  Mar 17  
Mar 13  Problem 15  Mar 31  
Mar 27  Problem 16  Apr 14  
Apr 10  Problem 17  Apr 28  
Apr 24  Problem 18  May 12  
May 8  Problem 19  May 26  
May 22  Problem 20  Jun 9  
Algebra  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer  
Jun 6  The Joke  Jun 24  
Jun 20  Marathon Mitch  Jul 8  
Jul 4  The Length of Larry's Rectangle  Jul 22  
Jul 18  Hiking Mount Hood  Aug 5  
Aug 1  Count Your Change  Aug 19  
Aug 15  Mind Reading  Sep 2  
Aug 29  Eduardo's Equation Challenge  Sep 16  
Sep 12  Problem 3  Sep 30  
Sep 26  Problem 4  Oct 14  
Oct 10  Problem 5  Oct 28  
Oct 24  Problem 6  Nov 11  
Nov 7  Problem 7  Nov 25  
Nov 21  Problem 8  Dec 9  
Dec 5  Problem 9  Dec 30  
Dec 19  Problem 10  Jan 13  
Jan 9  Problem 11  Jan 27  
Jan 23  Problem 12  Feb 10  
Feb 6  Problem 13  Feb 24  
Feb 20  Problem 14  Mar 10  
Mar 6  Problem 15  Mar 24  
Mar 20  Problem 16  Apr 7  
Apr 3  Problem 17  Apr 22  
Apr 17  Problem 18  May 5  
May 1  Problem 19  May 19  
May 15  Problem 20  Jun 2  
Geometry  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer  
May 30  Voulez Vous des Voissoirs?  Jun 17  
Jun 13  The Perimeter of an Octagon  Jul 1  
Jun 27  Where's Juanita Walking?  Jul 15  
Jul 11  Square in a Right Triangle  Jul 29  
Jul 25  So Many Similar Triangles!  Aug 12  
Aug 8  Is the Fair Fair?  Aug 26  
Aug 22  Divided Rectangle  Sep 9  
Sep 5  Problem 2  Sep 23  
Sep 19  Problem 3  Oct 7  
Oct 3  Problem 4  Oct 21  
Oct 17  Problem 5  Nov 4  
Oct 31  Problem 6  Nov 18  
Nov 14  Problem 7  Dec 2  
Nov 28  Problem 8  Dec 16  
Dec 12  Problem 9  Jan 8  
Dec 26  Problem 10  Jan 20  
Jan 16  Problem 11  Feb 3  
Jan 30  Problem 12  Feb 17  
Feb 13  Problem 13  Mar 3  
Feb 27  Problem 14  Mar 17  
Mar 13  Problem 15  Mar 31  
Mar 27  Problem 16  Apr 14  
Apr 10  Problem 17  Apr 28  
Apr 24  Problem 18  May 12  
May 8  Problem 19  May 26  
May 22  Problem 20  Jun 9  
Trig/Calc  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer  
Jun 6  Let’s Measure the Earth  Jun 24  
Jun 20  Shipping Packages  Jul 8  
Jul 4  A Problematic Pizza  Jul 22  
Jul 18  Another Problematic Pizza  Aug 5  
Aug 1  Time to Make the Doughnuts  Aug 19  
Aug 15  Making Money at the Movies  Sep 2  
Aug 29  Simple Signals  Sep 16  
Sep 12  Problem 3  Sep 30  
Sep 26  Problem 4  Oct 14  
Oct 10  Problem 5  Oct 28  
Oct 24  Problem 6  Nov 11  
Nov 7  Problem 7  Nov 25  
Nov 21  Problem 8  Dec 9  
Dec 5  Problem 9  Dec 30  
Dec 19  Problem 10  Jan 13  
Jan 9  Problem 11  Jan 27  
Jan 23  Problem 12  Feb 10  
Feb 6  Problem 13  Feb 24  
Feb 20  Problem 14  Mar 10  
Mar 6  Problem 15  Mar 24  
Mar 20  Problem 16  Apr 7  
Apr 3  Problem 17  Apr 22  
Apr 17  Problem 18  May 5  
May 1  Problem 19  May 19  
May 15  Problem 20  Jun 2  
* 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.