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, 09, 01 for September 01, 2015.)

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

20 | 15 | 09 | 01 |

2 | 8 | 14 | 21 |

12 | 19 | 4 | 10 |

11 | 3 | 18 | 13 |

Sum is 45.

20 | 15 | 09 | 01 |

-9 | -1 | 6 | 50 |

3 | -90 | 5 | -2 |

-5 | 2 | 10 | -27 |

Product is 2,700.

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 |