[Illustration]
The illustration explains itself. It will be found that the pips in every column, row, and long diagonal add up 18, as required.
406.--THE EIGHTEEN DOMINOES.
From Amusements in Mathematics by Henry Ernest Dudeney.
From Amusements in Mathematics by Henry Ernest Dudeney.
[Illustration]
The illustration explains itself. It will be found that the pips in every column, row, and long diagonal add up 18, as required.