MCQ practice · SSC General Mathematics Board questions · Chapter 4: Exponents and Logarithms
What is the characteristic of the common log of 0.0043?
Think it through first, then pick an option.
- a 3̄
- b 2̄
- c 2
- d 3
Answer and explanation
Correct answer: a 3̄
0.0043 = 4.3 × 10⁻³; 2 zeros, −(2 + 1) = 3̄.
Why the other options are wrong
- b 2̄: There are 2 zeros, so the answer is 3̄, not 2̄.
- c 2: The number is below 1, so the characteristic is negative.
- d 3: 3 is positive; here the characteristic is −3 = 3̄.
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