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, 16, 05, 05 for May 05, 2016.)

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

20 | 16 | 05 | 05 |

3 | 7 | 27 | 9 |

13 | 4 | 8 | 21 |

10 | 19 | 6 | 11 |

Sum is 46.

20 | 16 | 05 | 05 |

1 | 25 | 40 | 8 |

-10 | -1 | -8 | -100 |

-40 | -20 | -5 | -2 |

Product is 8,000.

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 |