| **Quick Problems** | **Level** | **Date** |

| | A Square Root Calculation | **π** **π** | 2/17/2013 |

| | Can you find the square root? |

| | A Sum of Reciprocals | **π** | 3/24/2013 |

| | A problem involving triangular numbers |

| | The Age of Diophantus | **π** | 2/17/2013 |

| | This problem can be traced back about 1500 years. |

| | The Locker Problem | **π** | 2/17/2013 |

| | A classic of elementary number theory |

| | What Is The Sum? | **π** | 5/12/2013 |

| | Using a multiplication trick, generalizing a well-known formula |