What is the fastest way to double your money?

Replace the question mark with the correct number below.

Find the missing letter in the last circle logically in the given below picture.

Can you place six X (crosses) in below board without making three in a row in any way ?

Count the number of squares in the picture below.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

Count the number of triangles in the below picture?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?