MCQ practice · SSC General Mathematics Board questions · Chapter 4: Exponents and Logarithms
What is the characteristic of the common log of 0.0035?
Think it through first, then pick an option.
- a 3
- b 1
- c 2̄
- d 3̄
Answer and explanation
Correct answer: d 3̄
0.0035 = 3.5 × 10⁻³ and has 2 zeros, so −(2 + 1) = 3̄.
Why the other options are wrong
- a 3: The characteristic would be positive for a number above 1; here 0.0035 < 1.
- b 1: 1 belongs to numbers from 10 to 99; this number is small.
- c 2̄: 0.0035 has 2 zeros, so −(2 + 1) = 3̄, not 2̄.
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