Daily Math Puzzle: 2026-06-23
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2026-06-23
You are a lone astronaut navigating a 3x3x3 grid of interconnected habitat modules in deep space. You start in the central module (position 1,1,1). Your goal is to reach the module (0,0,0) (one of the outermost corner modules). Unfortunately, your navigation console is faulty. When you press the 'Up' button, your module moves one step 'Forward'. When you press the 'Forward' button, your module moves one step 'Left'. And when you press the 'Left' button, your module moves one step 'Down'. All other direction buttons ('Down', 'Back', 'Right') are completely unresponsive. What is the minimum number of button presses required to reach module (0,0,0) from (1,1,1)?
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Solution
4 presses — Let's define a 3D coordinate system (X, Y, Z) for the habitat modules, where each axis ranges from 0 to 2.
- X-axis: Left (0) to Right (2)
- Y-axis: Back (0) to Forward (2)
- Z-axis: Down (0) to Up (2)
Your starting position is the central module: (1,1,1).
Your target position is the corner module: (0,0,0).
To reach (0,0,0) from (1,1,1), you need to achieve a net change of -1 in X, -1 in Y, and -1 in Z.
Let's analyze the faulty console's button mappings:
1. **'Up' button**: Moves your module one step 'Forward' (i.e., +1 in the Y-direction).
2. **'Forward' button**: Moves your module one step 'Left' (i.e., -1 in the X-direction).
3. **'Left' button**: Moves your module one step 'Down' (i.e., -1 in the Z-direction).
All other direction buttons are unresponsive.
Now, let's determine the minimum presses for each required movement:
* **For the X-axis (Goal: -1X, from 1 to 0):** The 'Forward' button directly provides a -X movement. This takes **1 press**.
* **For the Z-axis (Goal: -1Z, from 1 to 0):** The 'Left' button directly provides a -Z movement. This takes **1 press**.
* **For the Y-axis (Goal: -1Y, from 1 to 0):** This is the tricky part. The only Y-axis movement available is from the 'Up' button, which moves +Y (Forward). Since the modules are 'interconnected' and in 'deep space', we assume the grid wraps around (toroidal topology). To move from Y=1 to Y=0 using only +Y movements:
* From Y=1, pressing 'Up' once moves you to Y=2 (1 + 1 = 2).
* From Y=2, pressing 'Up' again moves you to Y=0 (2 + 1 = 3, which wraps around to 0 in a 0-1-2 grid).
Therefore, achieving a net -Y movement requires **2 presses** of the 'Up' button.
Combining these minimum presses for each axis:
- 1 press for X-axis (using 'Forward' button)
- 2 presses for Y-axis (using 'Up' button twice for wrap-around)
- 1 press for Z-axis (using 'Left' button)
Total minimum button presses = 1 + 2 + 1 = **4 presses**.
The order of presses does not change the total minimum count.
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