NDA Math Mock Test 02 – Question 38

Question:

If \((11101011)_2\) is converted to decimal system, then the resulting number is

यदि \((11101011)_2\) को दशमलव प्रणाली (decimal system) में परिवर्तित किया जाए, तो परिणामी संख्या क्या होगी?

Options:

  • 235
  • 160
  • 175
  • 126
  • 235
  • 160
  • 175
  • 126

Correct Answer: a)

Explanation:

\((11101011)_2 = 1 \cdot 2^7 + 1 \cdot 2^6 + 1 \cdot 2^5 + 0 \cdot 2^4 + 1 \cdot 2^3 + 0 \cdot 2^2 + 1 \cdot 2^1 + 1 \cdot 2^0 = 128 + 64 + 32 + 8 + 2 + 1 = 235\).

\((11101011)_2 = 128 + 64 + 32 + 8 + 2 + 1 = 235\)।

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