Find the exceptional bulb
In front of you are three bulbs. Each bulb lights up at a constant rate. 2 of them have the same rate and they are not synced to light up at the same time.
The image on the right shows all of the possibilities for (2 or more of) the bulbs to light up together, after waiting a long enough period of time.
Which bulb lights at a different rate compared to the other 2?
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1 solution
The answer is C, because A and B are never on together, which means that they have the same frequency therefore can never light up at the same time. On the other hand, C can be on together with A or B, which indicates that he has a different frequency from them and he can "catch up" to both of them.