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

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

There was a strange boy who was born before his father. How can this be possible?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

Count the number of balls in picture below:

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?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

What is the largest number you can write with just 3 digits?