In a certain code, 123 means hot filtered coffee, 356 means very hot day, and 589 means day and night. Which digit means very?
A9
B5
C8
D6 ✓ Correct
Correct answer: (D) 6
Explanation
The digit for very is 6.
123 = hot filtered coffee and 356 = very hot day share 3, so 3 = hot.
356 = very hot day and 589 = day and night share 5, so 5 = day.
In 356 = very hot day, 3 = hot and 5 = day are known.
That leaves 6 = very.
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