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?

You see me once in June, twice in November, and not at all in May. What am I?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What number when divided in half becomes zero?

Which word does the below Plexor means ?

You can hear me, but you can't touch or see me.

What am I?

What is the next shape from answers A, B, C, and D figure?

Find the next number in the sequence

5 12 24 36 ?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

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?