Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Take one out and scratch my head, I am now black but once was red. What am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?

how come the second man dies?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

There is one four-digit whole number n, such that the last four digits of n2 are the original number n