Readers with high attention to detail can identify the vampire in the picture. Can you?

I have Rs.50 and I spend it in the way as below.

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

If six children and two dogs were under an umbrella, how come none of them got wet?

What type of curtain does this rebus mean