M4maths Previous Puzzles

22 May 2018 Logarithm

If log 27 = 1.935, then the value of log 9 is

OPtion

1) 0.954
2) 0.645
3) 1.290
4) 0.9675
5) 1.391
6) 0.867
7) 1.135
8) 0.795
9) 1.375
10) None of these

Solution

Log 27 = Log 3^3 = 3Log3 = 1.935
=> Log3 = 1.935/3 = 0.645

Log 9 = Log3^2 = 2 Log3 = 2*(0.645) = 1.29

Correct Option: 3 Best Solution (0)