• 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, 09, 11, 22 for November 22, 2009.)
• Read more at "behind the Magic Square Maker".
| 20 | 09 | 11 | 22 |
| 7 | 26 | 19 | 10 |
| 27 | 13 | 4 | 18 |
| 8 | 14 | 28 | 12 |
Sum is 62.
| 20 | 09 | 11 | 22 |
| -11 | -22 | 12 | 15 |
| -66 | 55 | -3 | 4 |
| 3 | -4 | -110 | 33 |
Product is 43,560.
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 |