ABC26GN2038 · Logarithms

Subject: General Aptitude · Chapter: Logarithms · Exam: · Marks: · Difficulty:

The value of $\log _{2}\left(\log _{5} 625\right)$ is :
(a)2
(b)5
(c)10
(d)15
Answer
Answer (as printed): A
Explanation
$\log _{2}\left(\log _{5} 625\right)=\log _{2}\left(\log _{5} 5^{4}\right)=\log _{2}\left(4 \log _{5} 5\right)=\log _{2} 4=$ $\log _{2} 2^{2}=2 \log _{2} 2=2$.

Explanation as extracted from the printed page; notation may be imperfect.

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