What is the longest word in the dictionary?

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

You need to move three matchsticks to form three squares. Can you do it?

How many sides does a circle have?

How far can you walk into the woods?

You can see it everyday, But cannot touch it at will. What is it?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

How can you leave a room with two legs and return with six legs?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?