What always comes into a house through the keyhole?

How many triangles can you find in this given picture?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

If an electric train is travelling south, then which way is the smoke going?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Who is that with a neck and no head, two arms and no hands? What is it?

Can you solve the below rebus?

What makes this number unique: 8,549,176,320?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?