Quantitative Reasoning : Logarithms
2 = 0.3010, then find how many digits are contained in the number 256
Choice (3). 17 digits
To find the number of digits contained in the number, increment the characteristic (integral part) of the logarithmic value of the number by one.
Taking log of the given number, we get log10
= 56* log10
2 = 56 * 0.3010 = 16.85.
In this case, the characteristic (integral part) = 16.
Therefore, number of digits contained in the number 256
is 16 + 1 = 17.
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