I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

What is the next number in this series?

4,12,84,3612....

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

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?

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

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

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

If it took eight men ten hours to build a wall, how long would it take four men to build it?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?