Solve this riddle by finding the odd one out from the rest.

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

Can you find out the remainder when 3^300 is divided by 5?

What has many keys but can’t open a single lock?

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

I’m orange, I wear a green hat and I sound like a parrot. What am I?

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?

Why do we preferably have round manhole covers and not square ones?