A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Can you name an animal whose killing cannot be performed without spilling your own blood?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?