Find out the missing number in the picture attached:

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Who has married many women but was never married?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What type of tree can I carry in my hand?

I have eight fingers and two thumbs but I do not live. What Am I?

What jumps when it walks and sits when it stands?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?