John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?
As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.
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.
You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.
