Why do people go to bed?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

What does below Rebus mean ?

esgg sgeg gegs gsge

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

What is the word or phrase?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?