Can you replace the question mark with the correct number in the below table sequence?

How many triangles can you find in this given picture?

What kind of band never plays music?

I don't get anymore wetter, no matter how much rain falls on me.

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Buy me, smell me or deliver me, I do not change.

Who am I?

Who has married many women but was never married?

Can you count the number of matches in the picture below ?