What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

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

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

What kind of storm is always in a rush?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

I am an odd number. Take away a letter and I become even. What number am I?

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