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Binary subtraction of 101101 – 001011 = ?

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Binary subtraction of 101101 – 001011 = ?

(a) 100010

(b) 010110

(c) 110101

(d) 101100

This question was addressed to me in an international level competition.

This intriguing question originated from Arithmetic Operation in division Number System and Codes of Digital Circuits

1 Answer

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Best answer
Right answer is (a) 100010

Best explanation: The rules for binary subtraction are:

   0 – 0 = 0

   0 – 1 = 1 ( Borrow 1)

   1 – 0 = 1

   1 – 1 = 0

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