The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Using exactly three matchsticks, can you divide the area into two equal parts?

Who can jump higher than a Mountain?

Which is faster, Heat or Cold ? Explain.

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A man is surviving on an island along with his friend. They have been starving for four days for food. Suddenly, they find a fisherman. The friend goes with the fisherman in order to catch the fish (if they can find any).

The fisherman returns after some time but he is alone and has some salmon that he had prepared. When asked, the fisherman tells him that his best friend fell off the boat and drowned in the water. Starving for so long, he eats the meal while crying for his friend.

After being rescued, he goes to a diner and orders salmon. When he eats his meal, he jumps and commits suicide. Why did he do it?

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