Why do people go to bed?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

In a family supper, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one daughter-in-law, and one mother-in-law need to sit at a table.

There are only seven chairs available at the place. How many more chairs do they have to borrow so that everyone can sit down together for the suppers if everybody requires a separate chair?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

What brings you down but never up?

Different lights make me strange by changing me into different sizes. What am I?

What can you see in the middle of March and April that you can never see in any other month?

what one word does the below rebus identifies?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?