### Solving the Number Cube

To solve the Number Cube, all the faces must show the six mathematical sequences (shown above) & all of the numbers must have the same orientation.

To solve the Number Cube, all the faces must show the six mathematical sequences (shown above) & all of the numbers must have the same orientation.

- 1. Look for numbers that only appear once on the cube (“unique numbers”).
- 2. Solve the Prime Number side.
- 3. The lowest-level (17, 19, 23) and 13 are unique to that side.
- 4. The side adjacent to 17,19, 23 is the first three numbers of Pi. So that is the start of Pi side.
- 5. Treat the Prime Number side as “white” for a standard Rubik’s cube solution algorithm.
- 6. 13 and 23 have 3 and 8 of the Magic Square side.
- 7. 17 has 34 of the Fibonacci series (unique number).
- 8. Take the other numbers on the Prime side (2, 3, 5, 7). Use 2 and 7 and get them in the right orientation.
- 9. The 2 cube on the Prime Number side has to have another 2, (to satisfy the Fibonacci side -to the left) and the 7 has an 8, because there is only one 7-8 edge piece. This 2-2 corner also has to have a 28 to satisfy the Triangle Number side.
- 10. 2 and 8 on Fibonacci side, and 2 and 7 on the Prime side shared.
- 11. You need a 3 and 5 on Prime Number side, since they are the 2nd and 3rd Prime Numbers. Since the 2 has a 28 on it, the 3 has to have 36 and 5 have 45 to satisfy the Triangle Number side.
- 12. Since there is only one 5-45 corner piece, is will have a 4 on it to the right, which fits the diagram of the Magic Square.
- 13. Now that you have the Prime Number(white) side finished, you need to get the edge pieces shared by the sides that touch the Prime Number(white) side.
- 14. Apply the algorithm for solving the edge pieces that are shared by the sides that touch the Prime Number side.
- 15. After that, you need to get the correct edge pieces on the “e” side.(orientation doesn’t matter right now)
- 16. When you have solved the ”e” side edges, you need to solve the ”e” side corners. if you have the correct edges, then the edge pieces will be correctly oriented. if you don’t, then you will need to switch the corners with each other.
- 17. Now you have the top side (”e” side) and the bottom side (prime number side) done.
- 18. All that remains are the edge pieces of the Pi side, Magic Square side, Fibonacci side, and triangle side. once you rotate them, your cube is solved!

The following instructions for solving the Number Cube were submitted to us by Cedar Turek.

Submitted by Cedar Turek, age 12

Solution time: approximately 3 hours working time.