1. 2 days = 48 hours (24 each day)
2. 90 min= 1 and a half hours (60 min per hr plus 30 min for half an hour)
3.1 year= 365 days
4. 200 yr = 2 centuries (century= 100 years)
5. 5 min= 300 secounds (60 sec per min times 5)
6. 30 centuries= 3 millenia (1 century is 100 yrs times 30 equals 3000 years=30 centuries; one milenia =1000 years )
7. 365 days times 3 =1095 days
8.1459 days in four years including one leap year (1460 minus one day)
9. 168 hours in a week (24 hr in a day times 7 days a week)
