Dictionary
search :       browse : 
A B C D E F G H I J K L M
  N O P Q R S T U V W X Y Z
         
Description
Related Terms
Everyday Examples
Interactive Checkpoint
More Information
Challenge
How to use this dictionary
Contact
 Challenge
 Perfect Number:  A number in which the sum of all of its proper divisors equals the number itself.

Abundant, Deficient, and Perfect: Finding patterns among abundant, deficient, and perfect numbers.

Soma Cubes: Create your own set of soma cubes pieces and explore how they can fit together.