noun
A square grid of numbers where each row, column, and diagonal sums to the same constant. Used in mathematics and puzzles.
魔方陣は、縦・横・斜めの和がすべて等しくなる数字の並びです。
A magic square is an arrangement of numbers where the sums of each row, column, and diagonal are all equal.
彼は3×3の魔方陣を簡単
He can easily create a 3×3 magic square.
数独 (Sudoku) is a number-placement puzzle, while 魔方陣 is a specific mathematical arrangement with constant sums.
Compound of 魔 (ma, 'magic') + 方陣 (hōjin, 'square formation'). The term is a direct translation of the English 'magic square'.