Multiple choice

9 is the decimal equivalent of ____.

  1. 1010

  2. 1001

  3. 1110

  4. 1100

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To find which binary equals 9, we test: 1001 = 1×2³ + 0×2² + 0×2¹ + 1×2⁰ = 8 + 0 + 0 + 1 = 9. This is the correct representation.