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

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

Can you count the number of blocks in the picture below?

What part of the chicken has the most feathers?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

what does this picture(rebus) riddle means ?

Can you spot the man between the coffee bean in the picture below ?

How can you tell a raw egg from a hard-boiled egg?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?