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The 9’s complement of 6578 is ___________(a) 1234(b) 3421(c) 3124(d) 3420The question was posed to me in a national level competition.I'm obligated to ask this question of Complements in section Computer Arithmetic of Computer Fundamentals

Answer»

Right answer is (B) 3421

To explain I would say: 9’s COMPLEMENT is obtained by SUBTRACTING 9 from each bit of the number.

Here, 9999-6578=3421.

Therefore, the 9’s complement is 3421.



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