81 x 9 = 801. What must you do to make the this equation true?

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?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

How can a man go eight days without sleep?

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Rearrange the letters in "new door" to make one word.

What's the only room from which no one can enter or leave

How can you take 2 from 5 and leave 4?

People put me on the table and cut me but do not eat me. What am I?

Can you identify the famous TV character from the rebus below?