**EMT 725**
**Philippa M. Rhodes**

**Links to other challenge problem pages:**

**NCTM Challenge
Problems**

**Math problems and puzzles**

**Logic and math problems**

**Brain
Storm**

**Interactive Mathematics
Education and Puzzles**

*TEN SOLUTIONS*

**Average Rate**

**Cryptorithms**

**Inaccessible Angle**

**Painted Sides of a Cube**

**Pie Slices**

**Plug**

**Segment of Circle**

**Semi vs.
Quarter Circle**

**Sum of First
n integers**

**Tangent Lines - Internal and
External**

## Write-ups

**A. Unsolved Problem**

**Four 'Dawgs'**

**B. Position Paper**

## OTHER PROBLEMS

**Flower Bed**

**Gazebo**

**Island Treasure**

**Which is Largest?**

**Return to Philippa's Home Page.**