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, 11, 30 for November 30, 2015.)

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

20 | 15 | 11 | 30 |

37 | 4 | 23 | 12 |

9 | 13 | 36 | 18 |

10 | 44 | 6 | 16 |

Sum is 76.

20 | 15 | 11 | 30 |

6 | 55 | 2 | 150 |

5 | 10 | 90 | 22 |

165 | 12 | 50 | 1 |

Product is 99,000.

• 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 |