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, 14, 04, 23 for April 23, 2014.)

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

20 | 14 | 04 | 23 |

15 | 12 | 5 | 29 |

10 | 17 | 27 | 7 |

16 | 18 | 25 | 2 |

Sum is 61.

20 | 14 | 04 | 23 |

-1 | -92 | -5 | -56 |

-23 | -4 | -14 | -20 |

56 | 5 | 92 | 1 |

Product is 25,760.

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 |