Question 6
A $5\times5$ square board has its center square missing, marked black. A white knight moves in an L-shape: in the illustrated $3\times2$ rectangle it can move A to C, C to A, B to D, or D to B. Starting at the top-left square (Square 1), list every possible route by writing in order the numbers of the squares visited. A route passes through every available square exactly once.
