Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

What Does this text mean:

important=important

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Can you identify the hidden rebus in the image below?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

I cannot talk, but I always reply when spoken to. What am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?