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?

They are three errirs in this question. Can you find them?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

When we see 2 but call 10?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

How could a baby fall out of a twenty-story building onto the ground and live?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?