Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

What is the longest word in the dictionary?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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

Forwards I am heavy, backward I am not. 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.

Can you place three balls such that the equation shown in the picture holds true?