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

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?

What number do you get when you multiply all of the numbers on a telephone's number pad?

What happened when the wheel was invented?

Count the number of balls in picture below:

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

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

Can you spot the hidden girl in the picture below?