Multiple choice

How many 1's are present in the binary representation of $3 \times 512 + 7 \times 64 + 5 \times 8 + 3?$

  1. 8

  2. 9

  3. 10

  4. 11
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

512, 64, 8 and 0 are all powers of 8. The proceeding number is translatable in second to an octal number. $ 3 \times 8^3 + 7 \times 8^2 + 5 \times 8^1 + 3 \times 8^0 $ $ 3753_8 = 011 111 101 011_2 $

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