# Featured

## Conway Look and Say Sequence--Run Length Encoding

The **Conway Sequence** is a sequence of digits (also called **Look-and-Say sequence**) where each term is made of the reading of the digits (the number of consecutive digits) of the previous term. Conway created this sequence as a method of decoding called Run-Length Encoding.

## Conway Look and Say Sequence--Run Length Encoding

The **Conway Sequence** is a sequence of digits (also called **Look-and-Say sequence**) where each term is made of the reading of the digits (the number of consecutive digits) of the previous term. Conway created this sequence as a method of decoding called Run-Length Encoding.

## THE SUM-PRODUCT PUZZLE: Number of Distinct Entries Patterns

In 1983 the prolific conjecturer Paul Erdős posed a math problem: Take any set of numbers you like.

## Recycling Symbol Mobius Strip — Trees/CO2/Oxygen/Gasoline Burn

The Möbius strip has been the universal recycling symbol since the early 1970s. It symbolizes an endless cycle of recycling.

## Mobius Strip (1 face, 1edge) and Cylindrical Loops (2 faces, 2 edges)

Building on our exploration of perimeter in one dimension and area in two dimensions, we entered the real world of three dimensions. Starting with a rectangular strip of paper about 1.5” x 11” (by cutting a 1.5” piece the long way from a piece of regular 8.5” X 11” paper), I taped the two short edges together to make a cylindrical loop.