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

How can you write nineteen in a manner that if we take out one, it becomes twenty?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

What is the coolest letter in the alphabet?

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

I am an odd number. Take away a letter and I become even. What number am I?

Which tank will fill first?

What do you get if you add 2 to 100 four times?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?