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Yotta Paper 2 · Q16

Paper 2Logic & proofNumber & counting

Of the following 77 statements about numbered lamps in a factory, exactly one of them is true. Which one is the true statement? [nn is a positive integer]

AIf nn is even, lamp nn is switched on.
BIf nn is odd, lamp nn is switched off.
CIf nn is even, lamp nn is switched off.
DIf nn is odd, lamp nn is switched on.
EIf lamp nn is switched on, then nn is even.
FIf lamp nn is switched off, then nn is odd.
GIf lamp nn is switched off, then nn is even.

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