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?

If an electric train is travelling south, then which way is the smoke going?

What two things can you never eat for breakfast?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

Can you count the number of matches in the picture below ?

How many letters are in the alphabet?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

I can write cow in 13 letters.

Can You?