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Logarithm - General Aptitude

Q1:

If log 27 = 1.431, then the value of log 9 is:

A 0.934

B 0.945

C 0.954

D 0.958

ANS:C - 0.954

log 27 = 1.431  log (33 ) = 1.431  3 log 3 = 1.431  log 3 = 0.477  log 9 = log(32 ) = 2 log 3 = (2 x 0.477) = 0.954.