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WAEC Computer Studies 2025 Paper

Question : 45

Total: 50

The conversion of 110012 to base 10 equals

Solution:

Concept:

Convert a binary number to decimal using powers of 2.

Explanation:

The number is

11001_2

in base 2.

Write place values from right to left:

2^4, 2^3, 2^2, 2^1, 2^0

Expand each digit:

(1 \times 2^4) + (1 \times 2^3) + (0 \times 2^2) + (0 \times 2^1) + (1 \times 2^0)

Calculate:

16 + 8 + 0 + 0 + 1 = 25

Answer:

11001_2 = 25_{10}

Therefore, the correct option is C. 25.

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