If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

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?

Name a key which is hardest to turn.

Can it be possible to build a house that has all its four walls facing towards the South?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Which word does the below Plexor means ?

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

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