Will Give Brainliest to who ever can answer these questions right. GOOD LUCK!!

1. a barrel of water weighs 60 pounds, what must you put in it for it to weigh 40 pounds?
2. what month do people sleep the least?
3. I have lots of memories but i own nothing. what am i?
4. what has 6 faces but cannot wear makeup, has 21 eyes but cannot see?
5. what is in seasons, seconds, centuries and minutes, but not in decades, years, or seconds?