John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

I am quite hot but become too cold if you remove the first two letters. What am I?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

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?