If eleven plus two equals one, what does nine plus five equal?

I cannot talk, but I always reply when spoken to. What am I?

Can you replace the "?" in the picture table below with the appropriate numbers?

Can you count the number of rectangles on a chessboard?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

Can you find the 09 errors in the picture below?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Why are all black people so quick ?

Who has married many women but was never married?

Which digit occurred maximum times between the number 1 and 1000?