Logic circuits

What is the binary number 1011 in decimal?

  1. A11
  2. B9
  3. C13
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Answer: A. 11

The digits of a binary number have weights of 1, 2, 4 and 8 from the right. 1011 = 8×1 + 4×0 + 2×1 + 1×1 = 11.

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