What's the best place to go shopping in the ocean?

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?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

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

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What brings you down but never up?

Why did Buffon take the goal with him after every Juventus match?