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Squares

Level 30 / mastery

4d square mastery (lead 5-9)

8 visual steps / multiplication window train

1. Left Edge

1. Left Edge
raw windows
5x5 = 25. Carry waits for settle.

5x5 = 25. Carry waits for settle.

2. 2-Pair Window

2. 2-Pair Window
raw windows
2 pairs: 5x1 + 1x5 = 10. Carry waits for settle.

2 pairs: 5x1 + 1x5 = 10. Carry waits for settle.

3. 3-Pair Window

3. 3-Pair Window
raw windows
3 pairs: 5x2 + 1x1 + 2x5 = 21. Carry waits for settle.

3 pairs: 5x2 + 1x1 + 2x5 = 21. Carry waits for settle.

4. 4-Pair Center

4. 4-Pair Center
raw windows
4 pairs = 34. Carry waits for settle.

4 pairs = 34. Carry waits for settle.

5. 3-Pair Right Window

5. 3-Pair Right Window
raw windows
3 pairs: 1x3 + 2x2 + 3x1 = 10. Carry waits for settle.

3 pairs: 1x3 + 2x2 + 3x1 = 10. Carry waits for settle.

6. 2-Pair Right Window

6. 2-Pair Right Window
raw windows
2 pairs: 2x3 + 3x2 = 12. Carry waits for settle.

2 pairs: 2x3 + 3x2 = 12. Carry waits for settle.

7. 1-Pair Right Edge

7. 1-Pair Right Edge
raw windows
3x3 = 9. Raw fits.

3x3 = 9. Raw fits.

8. Settle strip

8. Settle strip
Settle onceRaw windows keep ones; extra carry moves left.raw windows
settled strip
25 | 10 | 21 | 34 | 10 | 12 | 9 -> 26245129.

25 | 10 | 21 | 34 | 10 | 12 | 9 -> 26245129.

Practice Level 30

Use the visible move, then type only when the answer is clear.

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