What is the next shape from answers A, B, C, and D figure?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you make a fire with just a single stick?

With the help clues provided in the image, can you find the 5 digit key?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

What is more useful when it is broken?