Can you name some countries which do not have the alphabet 'A' in them?

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

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

Solve the following series:
AZ, GT, MN, __, YB

Which word does the below Plexor means ?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

There are forty elephants and they have forty-fore heads. How can this be possible?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

Can you find the key in the picture below?