A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

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

What is the word or phrase below?
R | E | A | D

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

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 following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

I always drive my customer away.

Who am I?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

If your uncle’s sister is not your aunt, what relation is she to you?

What number do you get when you multiply all of the numbers on a telephone's number pad?