During which month do people sleep the least?

Find out the missing number in the picture attached:

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

what does this below rebus represent identXQQQQQME

I have feet, but no legs. Which animal Am I?

It belongs to you, but other people use it more than you do. What is it?