What four weights can be used to balance from 1 to 30 pounds?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

John is the son of Jacob.
So,
Jacob is the_____of John's father?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

I have an apple tree , number of apple in this tree get doubles every week.

On 30th week , the tree gets completely filled with apples :-)



Can you tell me , on what week does my tree is half covered with apples ?

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?