201415 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 201314 academic year.
[ Primary  Math Fundamentals  PreAlgebra  Algebra  Geometry  Trig/Calc ]
Primary  
Submissions Open 
Problem  Mentor Group 

Summer Problems 

Jun 2  Ants on a Bun  
Jun 16  Bubblegum  
Jun 30  Counting Cars  
Jul 14  How Many Berries Did I Eat?  
Jul 28  Goldfish Galore  
Aug 11  Ice Cream Party  
201415 

Aug 25  Back to School  
Sep 8  Problem 2  
Sep 22  Problem 3  
Oct 6  Problem 4  
Oct 20  Problem 5  
Nov 3  Problem 6  
Nov 17  Problem 7  
Dec 1  Problem 8  
Dec 15  Problem 9  
Jan 5  Problem 10  
Jan 19  Problem 11  
Feb 2  Problem 12  
Feb 16  Problem 13  
Mar 2  Problem 14  
Mar 16  Problem 15  
Mar 30  Problem 16  
Apr 13  Problem 17  
Apr 27  Problem 18  
May 11  Problem 19  
May 25  Problem 20  
Math Fundamentals  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer Problems 

Jun 9  Baseball Cards  
Jun 23  Marble Mayhem  
Jul 7  Pocket Change  
Jul 21  Horsin' Around  
Aug 4  The Teddy Bears' Banquet  
201415 

Aug 18  Football Fanfare  Sep 5  
Sep 1  Problem 2  Sep 19  
Sep 15  Problem 3  Oct 3  
Sep 29  Problem 4  Oct 17  
Oct 13  Problem 5  Oct 31  
Oct 27  Problem 6  Nov 14  
Nov 10  Problem 7  Nov 28  
Nov 24  Problem 8  Dec 12  
Dec 8  Problem 9  Dec 26  
Dec 22  Problem 10  Jan 16  
Jan 12  Problem 11  Jan 30  
Jan 26  Problem 12  Feb 13  
Feb 9  Problem 13  Feb 27  
Feb 23  Problem 14  Mar 13  
Mar 9  Problem 15  Mar 27  
Mar 23  Problem 16  Apr 10  
Apr 6  Problem 17  Apr 24  
Apr 20  Problem 18  May 8  
May 4  Problem 19  May 22  
May 18  Problem 20  Jun 5  
PreAlgebra  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer Problems 

Jun 2  Counting Chicken Wings  
Jun 16  Train Travel  
Jun 30  Ostrich Llama Count  
Jul 14  Anh's Code  
Jul 28  Ducky Promenade  
Aug 11  3D Vision  
201415 

Aug 25  Boxes of Stationary  Sep 12  
Sep 8  Problem 2  Sep 26  
Sep 22  Problem 3  Oct 10  
Oct 6  Problem 4  Oct 24  
Oct 20  Problem 5  Nov 7  
Nov 3  Problem 6  Nov 21  
Nov 17  Problem 7  Dec 5  
Dec 1  Problem 8  Dec 19  
Dec 15  Problem 9  Jan 9  
Jan 5  Problem 10  Jan 23  
Jan 19  Problem 11  Feb 6  
Feb 2  Problem 12  Feb 20  
Feb 16  Problem 13  Mar 6  
Mar 2  Problem 14  Mar 20  
Mar 16  Problem 15  Apr 3  
Mar 30  Problem 16  Apr 17  
Apr 13  Problem 17  May 1  
Apr 27  Problem 18  May 15  
May 11  Problem 19  May 29  
May 25  Problem 20  Jun 12  
Algebra  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer Problems 

Jun 9  Voter Turnout  
Jun 23  To B or Not To B  
Jul 7  Eating Contest  
Jul 21  Pressed for Time  
Aug 4  Field Trip  
201415 

Aug 18  My Three Dogs  Sep 5  
Sep 1  Problem 2  Sep 19  
Sep 15  Problem 3  Oct 3  
Sep 29  Problem 4  Oct 17  
Oct 13  Problem 5  Oct 31  
Oct 27  Problem 6  Nov 14  
Nov 10  Problem 7  Nov 28  
Nov 24  Problem 8  Dec 12  
Dec 8  Problem 9  Dec 26  
Dec 22  Problem 10  Jan 16  
Jan 12  Problem 11  Jan 30  
Jan 26  Problem 12  Feb 13  
Feb 9  Problem 13  Feb 27  
Feb 23  Problem 14  Mar 13  
Mar 9  Problem 15  Mar 27  
Mar 23  Problem 16  Apr 10  
Apr 6  Problem 17  Apr 24  
Apr 20  Problem 18  May 8  
May 4  Problem 19  May 22  
May 18  Problem 20  Jun 5  
Geometry  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer Problems 

Jun 2  Congruent Rectangles Help  
Jun 16  Eight Sticks and Zero Triangles  
Jun 30  Voulez Vous des Voussoirs?  
Jul 14  The Perimeter of an Octagon  
Jul 28  Where's Juanita Walking?  
Aug 11  Save the Lake!  
201415 

Aug 25  Fitting In  Sep 12  
Sep 8  Problem 2  Sep 26  
Sep 22  Problem 3  Oct 10  
Oct 6  Problem 4  Oct 24  
Oct 20  Problem 5  Nov 7  
Nov 3  Problem 6  Nov 21  
Nov 17  Problem 7  Dec 5  
Dec 1  Problem 8  Dec 19  
Dec 15  Problem 9  Jan 9  
Jan 5  Problem 10  Jan 23  
Jan 19  Problem 11  Feb 6  
Feb 2  Problem 12  Feb 20  
Feb 16  Problem 13  Mar 6  
Mar 2  Problem 14  Mar 20  
Mar 16  Problem 15  Apr 3  
Mar 30  Problem 16  Apr 17  
Apr 13  Problem 17  May 1  
Apr 27  Problem 18  May 15  
May 11  Problem 19  May 29  
May 25  Problem 20  Jun 12  
Trig/Calc  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer Problems 

Jun 9  The Supermarket Shelf  
Jun 23  The Triangle Inside an Angle  
Jul 7  The World's Strongest Man Competition  
Jul 21  Painting the Sine Curve  
Aug 4  The SuperUltraMegaBig Cup  
201415 

Aug 18  Preparing for the Test  Sep 5  
Sep 1  Problem 2  Sep 19  
Sep 15  Problem 3  Oct 3  
Sep 29  Problem 4  Oct 17  
Oct 13  Problem 5  Oct 31  
Oct 27  Problem 6  Nov 14  
Nov 10  Problem 7  Nov 28  
Nov 24  Problem 8  Dec 12  
Dec 8  Problem 9  Dec 26  
Dec 22  Problem 10  Jan 16  
Jan 12  Problem 11  Jan 30  
Jan 26  Problem 12  Feb 13  
Feb 9  Problem 13  Feb 27  
Feb 23  Problem 14  Mar 13  
Mar 9  Problem 15  Mar 27  
Mar 23  Problem 16  Apr 10  
Apr 6  Problem 17  Apr 24  
Apr 20  Problem 18  May 8  
May 4  Problem 19  May 22  
May 18  Problem 20  Jun 5  
* 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.