I travel all around the world but always stay in the corner. What am I?

Prove that the below maths equation is true.

8 + 8 = 91

Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.

What must Birbal buy to silence Akbar?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?