If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I am white when I am dirty, and black when I am clean. What am I?

There are forty elephants and they have forty-fore heads. How can this be possible?

How many words can a pen with half refill write?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

Find the next number in the series below

21 32 54 87 131 ?

How many times can you subtract the number 5 from 25?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.