The value of log (base 0.008) √5 + log (base√3) 81 – 7 is equal to

A) 1/3

B) 2/3

C) 5/6

D) 7/6

Option (C)

As per CAT 2017 – Quantitative Aptitude – Algebra – Logarithms, we can see that

log(base 0.008)5^(1/2) = -1/6

Log (base 3^1/2) 3^4 = 8

So, -1/6 + 8 – 7 = 5/6

Option (C)

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