Problem 9 · 2021 Math Kangaroo
Easy
Spatial & Visual Reasoning
transformationsspatial-reasoning
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Answer: B — The code 1893.
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Hint 1 of 2
Turning a single digit-wheel 180° replaces a digit by its upside-down version.
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Hint 2 of 2
Apply that flip to each of the four wheels of the starting code.
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Approach: rotate each wheel's digit by 180 degrees
- Rotating the lock 180° flips each shown digit to the digit directly opposite it on its wheel.
- Applying that turn to all four wheels of the start code gives the correct code.
- The matching display is option B.
- So the answer is B.
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