Magic Square Maker

• This page allows you to choose 4 integers (0 ~ 100,000) and creates a 4x4 magic square with the specified 4 numbers in the top row. ("Magic square" in Wikipedia)

• All numbers are unique unless duplicate(s) / triplicate / quadruplicate are specified for the top row.

• Negative numbers are used only if no solution is available otherwise.

• The numbers in the top row appear with leading 0's if they are entered with leading 0's.

(Useful for a date matrix, e.g., enter 20, 17, 11, 23 for November 23, 2017.)

• Read more at "behind the Magic Square Maker".

20 | 17 | 11 | 23 |

18 | 16 | 22 | 15 |

31 | 24 | 9 | 7 |

2 | 14 | 29 | 26 |

Sum is 71.

20 | 17 | 11 | 23 |

-1 | -253 | 68 | 5 |

391 | -5 | 1 | -44 |

-11 | 4 | 115 | -17 |

Product is 86,020.

Negative numbers are used.

• This program is written in R (r-project.org).

The "brew" package is used to integrate R and HTML.

• Magic square maker | • How many days |

• Pythagorean triples finder | • Prime factorization |

• Bivariate baseball score plots | • 3+3 designs |