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?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

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

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

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

Which digit occurred maximum times between the number 1 and 1000?

How can you make number one disappear by adding something to it?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?