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Computer Science for IGCSE & O level - Data Representation (Section 5 - No. 34)

What is the decimal equivalent of the binary number 10111?
21
22
23
24

Explication

10111 in binary = (1 * 16) + (0 * 8) + (1 * 4) + (1 * 2) + (1 * 1) = 23

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