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 measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

If two's company, and three's a crowd, then whats four and five ?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

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

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

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

Cristina was born in 1888. She just had her 30th birthday today how did that happen?