What has no start, end, or centre?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

What has 13 hearts but no other organs?

Move three sticks of the spiral below to form a square.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Which fur should we be getting from the Lion?