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.
Damascus
15 years
600bc
1,000.
1 decade equals 10 years and therefore 40 years divided by 10 years equals 4 decades.