Why do we preferably have round manhole covers and not square ones?

What has lots of eyes, but can’t see?

Who can jump higher than a Mountain?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Decode this picture on T-Shirt and tell what it says ?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

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?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?