The binary number 10101 is equivalent to decimal number_________________?
Correct answer: D. 21
- A. 19
- B. 12
- C. 27
- D. 21
Explanation
In 10101, the set bits represent 16, 4, and 1; their sum is 21. Therefore, the binary number converts to decimal as 16 + 4 + 1 = 21.
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