Both Filipino and Indian music genres excel at expressing love, says the young musician
entertainment1 hour ago
E4
Consider a building with 49 floors. It has five elevators on the floors numbered 17, 26, 20, 19 and 31. The elevators open only when ALL of them are on any one of the floors numbered 21, 22, 23, 24 or 25. We have to move TWO elevators such that they both go UP by eight floors or they both go DOWN by 13 floors. If this moving up or moving down constitutes a single move, find a sequence of these moves such that the elevators open.
Let me extend this problem a little further if it proves to be a little too simple. Let the five elevators be at floor numbers 20, 20, 22, 24 and 21. This time the elevator doors open only when all the elevators are at any one of the floors numbered 21, 22 or 23. Our aim remains the same, with the same +8 and -13 constraints applicable to any TWO elevators. Is there a unique solution to the above problems? If yes, prove why.
If no, think of all the stupid classes in school that had to be interrupted in mid-boredom by telling the guy or gal next to you if he or she could draw a certain figure without lifting the pencil off the paper or going over a line twice. Remember? Anyway, it's in fact a problem in flat topology. Having said that, is there a simple rule which can determine if the figure can be drawn or not? For your info, there is.
Both Filipino and Indian music genres excel at expressing love, says the young musician
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