A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Which tank will fill first?

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

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?

What English word has three consecutive double letters?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What do you call a fish without an eye?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There is a place where if I stand up straight, I will still be considered sideways.