The host of a game show offers the guest a choice of three doors. Behind one is an 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?

If an electric train is travelling south, then which way is the smoke going?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?