Aptitude - Logarithm - Discussion

Discussion Forum : Logarithm - General Questions (Q.No. 2)
2.
If log 2 = 0.3010 and log 3 = 0.4771, the value of log5 512 is:
2.870
2.967
3.876
3.912
Answer: Option
Explanation:
log5 512
= log 512
log 5
= log 29
log (10/2)
= 9 log 2
log 10 - log 2
= (9 x 0.3010)
1 - 0.3010
= 2.709
0.699
= 2709
699
= 3.876
Discussion:
71 comments Page 2 of 8.

Amrita said:   6 years ago
Can log 5 be written as log 2 + log 3?
(1)

Srini said:   6 years ago
How did you get 0.3010? please, do explain.

Simran said:   7 years ago
Can anyone explain it properly?

Aman mittal said:   7 years ago
Log base is 5 and exponential is 512 so how you kept log5=log512?
(1)

Sweta said:   7 years ago
@Dinesh Puri.

log 4=log 2^2.
=2log2,
=2log(10/5),
= 2*{log10-log5},
= 2*{1-.690},
= 0.62.

Dinesh puri said:   8 years ago
When log3=0.4771 and log 5=0.690then find value of log 4=?

Please solve this.

Angel said:   8 years ago
Given that log 2 =0.3010 and log 3=0.4771 what is log 1.125?
(1)

Bittu said:   8 years ago
Why do we take log base 10 in log table?

Ankush premi said:   8 years ago
How to solve this question 1-log5= 1/3 ( log1/2+logx +1/3 log5)?

Can anyone solve this

Dheeraj said:   8 years ago
@Naveen.

log27=log3^3=3log3=3 * 0.4771=1.4313.


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