Which number should replace the question mark?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

What have one eye but still cannot see?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

How many triangles are there in the picture below?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?