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Computer Science for IGCSE & O level - Data Representation (Section 3 - No. 6)

What is the decimal equivalent of the binary number 1111?
7
15
8
16

Explication

1111 = (1 * 2^3) + (1 * 2^2) + (1 * 2^1) + (1 * 2^0) = 8 + 4 + 2 + 1 = 15

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