I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

The dirtier I get, the whiter I look. Who am I?

Why is the Hole below a Lock?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What two things can you never eat for breakfast?

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

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?