/* starts with number, but has characters after (parsed as dimension) */
div.900west 
{
	background: red;
}

/* starts with number that ends with a zero, but has characters after (parsed as dimension) */
div.00bars 
{
	background: green;
}

/* class name starts with number followed by hyphen */
div.10-foo 
{
	background: blue;
}

/* class name all numbers (parsed as number) */
div.1234 
{
	background: red;
}

/* class name all numbers ending in zero (parsed as number) */
div.0000
{
	background: green;
}

/* class name starts with number ending in zero followed by hyphen */
div.00-foo 
{
	background: blue;
}

/* starts with number followed by underscore identifier */
div.30_ 
{
	background: black;
}