That entirely depends on the person, if you are like me, you may need 10 hours, but 8 is about average.
You're supose to have at least 8 to 10 hours of sleep.
well... 12 years old supposed to sleep 8 hours a sleep.
You are supposed to sleep at the minimum of 6 hours to maximum of 8 hours.At least 4 hours a night are required to maintain a somewhat balance of health.
8 to 9at least
How many hours does it sleep
they sleep for 10 hours a day they sleep for 10 hours a day
they need about 6 hours of sleep
Elephants sleep for 2 hours
About 8-9 hours(:actually, they are supposed to need 10-12 but 8-9 does seem more reasonable a goal
if you mean how many hours you should sleep in a year it would be 3,650 hours of sleep for a regular year not a leap year
They sleep upto 18 hours a day.
about 10 hours of sleep