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. 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, 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 

Summer  
June 5  Up, Up, and Away!  
Jun 19  What Do I Have in My Bag?  
Jul 3  Pizza Night  
Jul 17  The Eagle and the Bear  
Jul 31  How Many Berries Did I Eat?  
Aug 14  A Game of Dice  
Aug 28  Problem 2  
Sep 11  Problem 3  
Sep 25  Problem 4  
Oct 9  Problem 5  
Oct 23  Problem 6  
Nov 6  Problem 7  
Nov 20  Problem 8  
Dec 4  Problem 9  
Dec 18  Problem 10  
Jan 8  Problem 11  
Jan 22  Problem 12  
Feb 5  Problem 13  
Feb 19  Problem 14  
Mar 5  Problem 15  
Mar 19  Problem 16  
Apr 2  Problem 17  
Apr 16  Problem 18  
Apr 30  Problem 19  
May 14  Problem 20  
Math Fundamentals  
Submissions Open 
Problem  Mentor Group 
Solutions Posted 

Summer  
May 29  So Many Salmon  Jun 16  
Jun 12  A Dicey Situation  Jun 30  
Jun 26  Eating Grapes  Jul 14  
Jul 10  Filling the Freezer  Jul 28  
Jul 24  Odds vs. Evens  Aug 11  
Aug 7  Frog Farming  Aug 25  
Aug 21  Sharing Birthdays  Sep 8  
Sep 4  Problem 2  Sep 22  
Sep 18  Problem 3  Oct 6  
Oct 2  Problem 4  Oct 20  
Oct 16  Problem 5  Nov 3  
Oct 30  Problem 6  Nov 17  
Nov 13  Problem 7  Dec 1  
Nov 27  Problem 8  Dec 15  
Dec 11  Problem 9  Jan 5  
Jan 1  Problem 10  Jan 19  
Jan 15  Problem 11  Feb 2  
Jan 29  Problem 12  Feb 16  
Feb 12  Problem 13  Mar 2  
Feb 26  Problem 14  Mar 16  
Mar 12  Problem 15  Mar 30  
Mar 26  Problem 16  Apr 13  
Apr 9  Problem 17  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 

Summer  
June 5  Top Notch Nose Contest  Jun 23  
Jun 19  Scale Stepping  Jul 7  
Jul 3  Cork Costs  Jun 21  
Jul 17  Measuring Melons  Aug 4  
Jul 31  A Cranberry Craving  Aug 18  
Aug 14  At Least a Mile  Sep 1  
Aug 28  Problem 2  Sep 15  
Sep 11  Problem 3  Sep 29  
Sep 25  Problem 4  Oct 13  
Oct 9  Problem 5  Oct 27  
Oct 23  Problem 6  Nov 10  
Nov 6  Problem 7  Nov 24  
Nov 20  Problem 8  Dec 8  
Dec 4  Problem 9  Dec 22  
Dec 18  Problem 10  Jan 12  
Jan 8  Problem 11  Jan 26  
Jan 22  Problem 12  Feb 9  
Feb 5  Problem 13  Feb 23  
Feb 19  Problem 14  Mar 9  
Mar 5  Problem 15  Mar 23  
Mar 19  Problem 16  Apr 6  
Apr 2  Problem 17  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 

Summer  
May 29  Voter Turnout  Jun 16  
Jun 12  To B or Not To B  Jun 30  
Jun 26  Eating Contest  Jul 14  
Jul 10  Pressed for Time  Jul 28  
Jul 24  Field Trip  Aug 11  
Aug 7  Two By Canoe  Aug 25  
Aug 21  My Three Dogs  Sep 8  
Sep 4  Problem 2  Sep 22  
Sep 18  Problem 3  Oct 6  
Oct 2  Problem 4  Oct 20  
Oct 16  Problem 5  Nov 3  
Oct 30  Problem 6  Nov 17  
Nov 13  Problem 7  Dec 1  
Nov 27  Problem 8  Dec 15  
Dec 11  Problem 9  Jan 5  
Jan 1  Problem 10  Jan 19  
Jan 15  Problem 11  Feb 2  
Jan 29  Problem 12  Feb 16  
Feb 12  Problem 13  Mar 2  
Feb 26  Problem 14  Mar 16  
Mar 12  Problem 15  Mar 30  
Mar 26  Problem 16  Apr 13  
Apr 9  Problem 17  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 

Summer  
June 5  Save the Lake!  Jun 23  
Jun 19  Fix This Picture  Jul 7  
Jul 3  Four Point Puzzle  Jun 21  
Jul 17  Flying High  Aug 4  
Jul 31  Nautical Navigation  Aug 18  
Aug 14  Visiting Friends  Sep 1  
Aug 28  Problem 2  Sep 15  
Sep 11  Problem 3  Sep 29  
Sep 25  Problem 4  Oct 13  
Oct 9  Problem 5  Oct 27  
Oct 23  Problem 6  Nov 10  
Nov 6  Problem 7  Nov 24  
Nov 20  Problem 8  Dec 8  
Dec 4  Problem 9  Dec 22  
Dec 18  Problem 10  Jan 12  
Jan 8  Problem 11  Jan 26  
Jan 22  Problem 12  Feb 9  
Feb 5  Problem 13  Feb 23  
Feb 19  Problem 14  Mar 9  
Mar 5  Problem 15  Mar 23  
Mar 19  Problem 16  Apr 6  
Apr 2  Problem 17  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 

Summer  
May 29  Preparing for the Test  Jun 16  
Jun 12  The Triangle Inside an Angle  Jun 30  
Jun 26  The World's Strongest Man Competition  Jul 14  
Jul 10  Painting the Sine Curve  Jul 28  
Jul 24  The SuperUltraMegaBig Cup  Aug 11  
Aug 7  The Supermarket Shelf  Aug 25  
Aug 21  Preparing for the Test  Sep 8  
Sep 4  Problem 2  Sep 22  
Sep 18  Problem 3  Oct 6  
Oct 2  Problem 4  Oct 20  
Oct 16  Problem 5  Nov 3  
Oct 30  Problem 6  Nov 17  
Nov 13  Problem 7  Dec 1  
Nov 27  Problem 8  Dec 15  
Dec 11  Problem 9  Jan 5  
Jan 1  Problem 10  Jan 19  
Jan 15  Problem 11  Feb 2  
Jan 29  Problem 12  Feb 16  
Feb 12  Problem 13  Mar 2  
Feb 26  Problem 14  Mar 16  
Mar 12  Problem 15  Mar 30  
Mar 26  Problem 16  Apr 13  
Apr 9  Problem 17  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.