Multiple choice

What number in binary number system is equivalent to 77 in octal number system?

  1. 111111

  2. 1001101

  3. 11011101

  4. 100011001

  5. 01110111
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A Correct answer
Explanation

77 in octal system is equivalent to 8*7 + 7 = 63 in decimal number system. 62 in decimal can be written as sum of powers of 2 as 32 + 16 + 8 + 4 + 2 + 1. So, the required binary number is 111111.

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