Can you identify if it's a murder or a suicide ?

Can you solve this picture maths equation?

What number should come in place of the question mark below?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

What does the rebus below mean?

TEN BADTION

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

What has one eye, but can’t see?