Where do you go to learn how to make ice cream?

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?

A father's child, a mother's child, yet no one's son.

Who am I?

Can you write down eight eights so that they add up to one thousand?

I have eight fingers and two thumbs but I do not live. What Am I?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

How do you go from 98 to 720 using just one letter?

What kind of storm is always in a rush?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?