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, 15, 04, 18 for April 18, 2015.)

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

20 | 15 | 04 | 18 |

21 | 1 | 12 | 23 |

6 | 17 | 27 | 7 |

10 | 24 | 14 | 9 |

Sum is 57.

20 | 15 | 04 | 18 |

9 | 8 | 100 | 3 |

10 | 1 | 27 | 80 |

12 | 180 | 2 | 5 |

Product is 21,600.

• 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 |