This work brings more concepts in magic squares. In past we studied a lot of upside-down and mirror looking magic squares. These are based some kind of digital/special fonts. To understand better let’s consider the following 10 digits from 0 to 9:

Upside-down (180 degrees rotation)
Let’s make 180 degrees rotation over the above 10 digits, we get

We observe that the numbers 0, 1, 2, 5, 6, 8 and 9 are still there. The difference is that 6 becomes 9.
Mirror Looking (Horizontal Flip)
Let’s see how these numbers can seen in mirror:

We observe that the numbers 0, 1, 2, 5 and 8 are still there. In this case the numbers 2 and 5 interchanges, i.e., 2 becomes 5 and 5 as 2.
In general there are two kinds of flips, i.e., horizontal flip and vertical filp. See the image below:

Source: https://www.mathsisfun.com/definitions/vertical-flip.html
Water Reflection (Vertical Flip)
Making vertical flip over the digits 0 to 9, we get

We observe the numbers 0, 1, 2, 3, 5 and 8 remains the same. The numebrs 0, 1, 2, 5 and 8 are already in mirror looking except the number. That’s why we call these numbers as universal numbers. Here also 2 becomes 5 and 5 as 2. Thus using vertical flip, we get an extra number as 3. Let’s call the operation as water reflection. This means that the numbers 0, 1, 2, 3, 5 and 8 are water reflexive.
The aim this work is write magic squares based on the numbers 0, 1, 2, 3, 5 and 8, where 3 is always there, i.e., making combinations of 3 with the numbers 0, 1, 2, 5 and 8. This work is for orders 11 to 13. See the details of this work
- Magic Squares of Order 11
- a) 4-Digits Cell Entries:
- Example 1. Magic Square with 4-Digits (2,3,5,8)
- Example 2. Magic Square with 4-Digits (1,2,3,5)
- Example 3. Magic Squares with 4-Digits (0,2,3,5)
- Example 4. Magic Squares with 4-Digits (0,1,3,8)
- b) 6-Digits Cell Entries:
- Example 5. Magic Square with 3-Digits (2,3,5)
- Example 6. Magic Square with 3-Digits (1,3,8)
- Example 7. Magic Square with 3-Digits (0,3,8)
- Example 8. Magic Square with 3-Digits (0,1,3)
- c) 8-Digits Cell Entries:
- Example 9. Magic Square with 2-Digits (3,8)
- Example 10. Magic Square with 3-Digits (1,3)
- Example 11. Magic Square with 3-Digits (0,3)
- a) 4-Digits Cell Entries:
- Magic Squares of Order 12: Blocks of Magic Squares of Order 4
- a) 4-Digits Cell Entries:
- Example 12. Magic Square with 4-Digits (2,3,5,8)
- Example 13. Magic Square with 4-Digits (1,2,3,5)
- Example 14. Magic Square with 4-Digits (0,2,3,5)
- Example 15. Magic Square with 4-Digits (0,1,3,8)
- b) 6-Digits Cell Entries:
- Example 16. The Digits (2,3,5)
- Example 17. The Digits (1,3,8)
- Example 18. The Digits (0,3,8)
- Example 19. The Digits (0,1,3)
- c) 8-Digits Cell Entries:
- Example 20. The Digits (3,8)
- Example 21. The Digits (1,3)
- Example 22. The Digits (0,3)
- a) 4-Digits Cell Entries:
- Magic Squares of Order 12: Blocks of Semi-Magic Squares of Order 3
- a) 4-Digits Cell Entries
- Example 23. The 4-Digits (2,3,5,8)
- Example 24. The 4-Digits (1,2,3,5)
- Example 25. The 4-Digits (0,2,3,5)
- Example 26. 4-The Digits (0,1,3,8)
- b) 6-Digits Cell Entries
- Example 27. The 3-Digits (2,3,5)
- Example 28. The 3-Digits (1,3,8)
- Example 29. The 3-Digits (0,3,8)
- Example 30. The 3-Digits (0,1,3)
- b) 8-Digits Cell Entries
- Example 31. The 2-Digits (3,8)
- Example 32. The 2-Digits (1,3)
- Example 33. The 2-Digits (0,3)
- a) 4-Digits Cell Entries
- Magic Squares of Order 13
- a) 4-Digits Cell Entries
- Example 34. The 4-Digits (2,3,5,8)
- Example 35. The 4-Digits (1,2,3,5)
- Example 36. The 4-Digits (0,2,3,5)
- Example 37. The 4-Digits (0,1,3,8)
- b) 6-Digits Cell Entries
- Example 38. The 3-Digits (2,3,5)
- Example 39. The 3-Digits (1,3,8)
- Example 40. The 3-Digits (0,3,8)
- Example 41. The 3-Digits (0,1,3)
- b) 8-Digits Cell Entries
- Example 42. The 2-Digits (3,8)
- Example 43. The 2-Digits (1,3)
- Example 44. The 2-Digits (0,3)
- a) 4-Digits Cell Entries
- References
Full work can be downloaded from the following link:
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 11 to 13, Zenodo, January 15, 2025, pp. 1-146, https://doi.org/10.5281/zenodo.14649320.
For the previous work on orders 3 to 10 refer the links below. The link of this work is also there.
- Inder J. Taneja, Water Reflection Magic Squares: Order 3 to 6.
- Inder J. Taneja, Water Reflection Magic Squares: Order 7 to 10.
- Inder J. Taneja, Water Reflection Magic Squares: Order 11 to 13.
Magic Squares of Order 11
a) 4-Digits Cell Entries:
Example 1. Magic Square with 4-Digits (2, 3, 5, 8)

Water Reflection Image

Example 2. Magic Square with 4-Digits (1, 2, 3, 5)

Water Reflection Image

Example 3. Magic Squares with 4-Digits (0, 2, 3, 5)

Water Reflection Image

Example 4. Magic Squares with 4-Digits (0,1, 3, 8)

Water Reflection Image

Thus, we have four examples of water reflection pandiagonal magic squares of order 11 having 4-digits cells entries with four number combinations (2,3,5,8), (1,2,3,5), (0,2, 5, 8) and, (0,1,3,8).
b) 6-Digits Cell Entries:
Example 5. Magic Square with 3-Digits (2, 3, 5)

Water Reflection Image

Example 6. Magic Square with 3-Digits (1, 3, 8)

Water Reflection Image

Example 7. Magic Square with 3-Digits (0, 3, 8)

Water Reflection Image

Example 8. Magic Square with 3-Digits (0, 1, 3)

Water Reflection Image

Thus, we have four examples of water reflection pandiagonal magic squares of order 11 having 6-digits cells entries with three numbers combinations (2, 3, 5), (1, 3, 8), (0,3,8) and, (0, 1, 3).
c) 8-Digits Cell Entries:
Example 9. Magic Square with 2-Digits (3, 8)

Water Reflection Image

Example 10. Magic Square with 3-Digits (1, 3)

Water Reflection Image

Example 11. Magic Square with 3-Digits (0, 3)

Water Reflection Image

Thus, we have three examples of water reflection pandiagonal magic squares of order 11 having 8-digits cells entries with two numbers combinations (3, 8), (1, 3) and, (0, 3).
Magic Squares of Order 12:
Blocks of Magic Squares of Order 4
a) 4-Digits Cell Entries:
Example 12. Magic Square with 4-Digits (2, 3, 5, 8)

Water Reflection Image

Example 13. Magic Square with 4-Digits (1, 2, 3, 5)

Water Reflection Image

Example 14. Magic Square with 4-Digits (0, 2, 3, 5)

Water Reflection Image

Example 15. Magic Square with 4-Digits (0, 1, 3, 8)

Water Reflection Image

Total there are four water reflection magic squares. Out of them three semi-magic squares of order 12 having 4-digits cells entries with four numbers combinations (2, 3, 5, 8), (1, 2, 3, 5) and (0,1, 3, 8). The blocks of order 4 are magic squares of order 4 with different magic sums. The one with 4-digits (0, 2, 3, 5) is magic squares with blocks of order 4 are pandiagonal magic squares with equal magic sums.
b) 6-Digits Cell Entries:
Example 16. The Digits (2, 3, 5)

Water Reflection Image

Example 17. The Digits (1, 3, 8)

Water Reflection Image

Example 18. The Digits (0, 3, 8)

Water Reflection Image

Example 19. The Digits (0, 1, 3)

Water Reflection Image

Thus, we have four examples of water reflection semi-magic squares of order 12 having 6-digits cells entries with three numbers combinations (2,3,5), (1,3, 8), (0, 3, 8) and (0,1, 3). The blocks of order 4 are different sums magic squares of order 4.
c) 8-Digits Cell Entries:
Example 20. The Digits (3, 8)

Water Reflection Image

Example 21. The Digits (1, 3)

Water Reflection Image

Example 22. The Digits (0, 3)

Water Reflection Image

Thus, we have three examples of water reflection pandiagonal magic squares of order 12 having 8-digits cells entries with two numbers combinations (3,8), (1,3) and (0, 3). The blocks of order 4 are also pandiagonal magic squares of order 4 with equal magic sums.
Magic Squares of Order 12:
Blocks of Semi-Magic Squares of Order 3
a) 4-Digits Cell Entries
Example 23. The 4-Digits (2, 3, 5, 8)

Water Reflection Image

Example 24. The 4-Digits (1, 2, 3, 5)

Water Reflection Image

Example 25. The 4-Digits (0, 2, 3, 5)

Water Reflection Image

Example 26. 4-The Digits (0, 1, 3, 8)

Water Reflection Image

Total we have four magic squares. Out of them three examples are water reflexive semi-magic squares of order 12 having 4-digits cells entries with 4 numbers combinations (2, 3, 5, 8), (1, 2, 3, 5) and (0, 1, 3, 8). The blocks of order 3 are also semi-magic squares of order 3 with different semi-magic sums.
The only one magic square of order 12 with digits (0, 2, 3, 5) is pandiagonal, but the blocks of order 3 are semi-magic square with different semi-magic sums, but the water reflection property in this case is semi-magic square of order 12.
b) 6-Digits Cell Entries
Example 27. The 3-Digits (2, 3, 5)

Water Reflection Image

Example 28. The 3-Digits (1, 3, 8)

Water Reflection Image

Example 29. The 3-Digits (0, 3, 8)

Water Reflection Image

Example 30. The 3-Digits (0, 1, 3)

Water Reflection Image

Thus, we have four examples of water reflexive semi-magic squares of order 12 having 6-digits cells entries with 3 numbers combinations (2, 3, 5), (1, 3, 8), (0, 3, 8) and (0, 1, 3). The blocks of order 3 are also semi-magic squares of order 3 with different semi-magic sums.
b) 8-Digits Cell Entries
Example 31. The 2-Digits (3, 8)

Water Reflection Image

Example 32. The 2-Digits (1, 3)

Water Reflection Image

Example 33. The 2-Digits (0, 3)

Water Reflection Image

Thus, we have three examples of water reflection magic squares of order 12 having 8-digits cells entries with 2 numbers combinations (3, 8), (1, 3) and (0, 3). The blocks of order 3 are semi-magic squares of order 3 with different semi-magic sums.
Magic Squares of Order 13
a) 4-Digits Cell Entries
Example 34. The 4-Digits (2, 3, 5, 8)

Water Reflection Image

Example 35. The 4-Digits (1, 2, 3, 5)

Water Reflection Image

Example 36. The 4-Digits (0, 2, 3, 5)

Water Reflection Image

Example 37. The 4-Digits (0, 1, 3, 8)

Water Reflection Image

Thus, we have four examples of water reflection pandiagonal magic squares of order 13 having 4-digits cells entries with 4 numbers combinations (2, 3, 5, 8), (1, 2, 3, 5), (0, 2, 3, 5) and (0,1,3,8).
b) 6-Digits Cell Entries
Example 38. The 3-Digits (2, 3, 5)

Water Reflection Image

Example 39. The 3-Digits (1, 3, 8)

Water Reflection Image

Example 40. The 3-Digits (0, 3, 8)

Water Reflection Image

Example 41. The 3-Digits (0, 1, 3)

Water Reflection Image

Thus, we have four examples of water reflection pandiagonal magic squares of order 13 having 6-digits cells entries with 3 numbers combinations (2, 3, 5), (1, 3, 8), (0, 3, 8) and (0, 1, 3).
b) 8-Digits Cell Entries
Example 42. The 2-Digits (3, 8)

Water Reflection Image

Example 43. The 2-Digits (1, 3)

Water Reflection Image

Example 44. The 2-Digits (0, 3)

Water Reflection Image

Thus, we have three examples of water reflection pandiagonal magic squares of order 13 having 8-digits cells entries with 2 numbers combinations (3, 8), (1, 3) and (0, 3).
References
Below are references of complete project in 8 parts for the orders 3 to 25. Mainly, it includes three things: Upside-down, Mirror Looking and Water Reflection properties of magic squares.
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 3 to 6, Zenodo, January 07, 2025, pp. 1-93, https://doi.org/10.5281/zenodo.14607070.
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 7 to 10, Zenodo, January 07, 2025, pp. 1-171, https://doi.org/10.5281/zenodo.14607071.
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 11 to 13, Zenodo, January 15, 2025, pp. 1-146, https://doi.org/10.5281/zenodo.14649320.
- Site link: Universal and Upside-Down Magic Squares of Orders 11 to 15 (new site)
- Site link: Water Reflection Magic Squares: Order 11 to 13 (new site).
- Site link: Universal and Upside-Down Magic Squares of Orders 11 to 15 (old site)
- Site link: Water Reflection Magic Squares: Orders 11 to 13 (old site)
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 14 to 16, Zenodo, January 15, 2024, pp. 1-140, https://doi.org/10.5281/zenodo.14649519.
- Site link: Universal and Upside-Down Magic and Bimagic Squares of Order 16 (new site)
- Site link: Water Reflection Magic Squares: Order 14 to 16 (new site).
- Site link: Universal and Upside-Down Magic and Bimagic Squares of Order 16 (old site)
- Site link: Water Reflection Magic Squares: Orders 14 to 16 (old site)
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 17 to 20, Zenodo, January 17, 2025, pp. 1-86, https://doi.org/10.5281/zenodo.14676293.
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Orders 21 to 23, Zenodo, January 20, 2025, pp. 1-83, https://doi.org/10.5281/zenodo.14688709.
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Order 24, Zenodo, Janeiro 20, 2025, pp. 1-150, https://doi.org/10.5281/zenodo.14700325
- Inder J. Taneja, Upside-Down, Mirror Looking and Water Reflection Magic Squares: Order 25, Zenodo, January 21, 2025, pp. 1-79, https://doi.org/10.5281/zenodo.14715162.