It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Identify Me

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

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?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Can you count the number of blocks in the picture below?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

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?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?