What is the binary number for decimal number 9?
2020
What is the binary number for decimal number 9?
- A.
1100
- B.
1001
- C.
0111
- D.
1011
Attempted by 161 students.
Show answer & explanation
Correct answer: B
To convert 9₁₀ to binary, write it as powers of 2: 9 = 8 + 1 = 2³ + 2⁰. Therefore, the bits for 2³ and 2⁰ are 1 and the bits for 2² and 2¹ are 0, giving 1001₂.