WAEC Computer Studies 2025 Objective — Question 44

Question 44 of 50 from the West African Examinations Council (WAEC) Computer Studies 2025 Objective paper, with the correct answer and a full explanation.

The binary number 100101 can be written in denary as:

A. 25
B. 37Correct
C. 45
D. 211

Explanation

Denary is another name for base 10. 100101₂ = (1×2⁵)+(0×2⁴)+(0×2³)+(1×2²)+(0×2¹)+(1×2⁰) = 32+0+0+4+0+1 = 37.

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