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, 05, 27 for May 27, 2015.)

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

20 | 15 | 05 | 27 |

22 | 10 | 28 | 7 |

24 | 11 | 18 | 14 |

1 | 31 | 16 | 19 |

Sum is 67.

20 | 15 | 05 | 27 |

135 | 1 | 30 | 10 |

-15 | -50 | -27 | -2 |

-1 | -54 | -10 | -75 |

Product is 40,500.

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 |