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Previous Year Question (PYQs)

Consider the following 4- bit binary numbers represented in the 2’s complement form : 1101 and 0100 What would be the result when we add them?




Solution

2's Complement Addition (4-bit)

Given: 1101 and 0100 (in 2’s complement)

Step-by-step:

  • 1101 = −3 (in decimal)
  • 0100 = +4 (in decimal)
  • Sum = −3 + 4 = +1
  • +1 in 4-bit 2’s complement = 0001

✅ Final Answer: 0001


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