What do you call a fish without an eye?

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

Which is faster, Heat or Cold ? Explain.

Decode below rebus
D
N
A
T
S , D

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

I taste better than I can smell. Who am I?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?