10:00 because your still growing.

Depending on what time you get up in the morning. You need at least 8 hours to sleep as an adult, more if you are still growing. The body grows, heals and regenerates between the hours of 10 PM and 5 AM so you want to be asleep before 10:00 PM and try to sleep past 5:00 AM.

When you say  "go to bed" do you mean actually go to sleep, or just go in and lay in bed and talk to your sibling for 2 hours??  When 12, I went into my room, and "went to bed" at about 9pm.  I actually fell asleep about 11pm. My brother and I did our best goofing around at that time!!

i know when i was 12,i went to bed around half 10 the latest,then again..i was always good about sleep

9pm

9pm

9 or 10 pm

8:30-9:00.

when your mum tells you to