When my father was 31 I was 8. Now he is twice as old as me. How old am I?

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 ?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Which Travels Faster? Solve below famous picture riddle:

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

How many triangles can you count in the figure given?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?