Question 60
A set of 8 dominoes is given, each consisting of two unit squares:
Is it possible to completely cover a rectangular grid of size $4 \times 4$ with these dominoes in such a way that all rows and columns of the grid contain the same number of pips?
Is it possible to completely cover a rectangular grid of size $4 \times 4$ with these dominoes in such a way that all rows and columns of the grid contain the same number of pips?