Find out the missing number in the picture attached:

Spot the cat in the picture below

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

When it is alive we sing, when it is dead we clap our hands. What is it?

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

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1