600 BC is one year - way back in history. It is like asking how many years is 2012. It is one year - it will start in around 6 months from now (late June 2011) and finish exactly a year later. 2012 is 1 year.
400
there were 16 mahajanpadas by 600BC
Yes.
909,814,300 seconds equals 28.85 years.
One half a century equals 50 years as a century equals 100 years.
100 years
A millennium equals 1000 years, so 5.25 millennia equals 5.25 millennia x 1000 years per millennia, which equals 5,250 years.
15 years
Damascus
1,000.
There are ten years in a decade.
67