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 6 of 8.

Sandy said:   1 decade ago
log 10 means
log 10 to the base 10
that ts equal to 1
so,
log10=1

Jithu said:   1 decade ago
@kasthuri. Can you explain the solution ?

Kasthuri said:   1 decade ago
If log 2 = 0.3010 and log 3 = 0.4771,and log 7 = 0.8451 then the value of log75 is?

Sumit said:   1 decade ago
How can you get log (10/2) ?

AJITHA said:   10 years ago
log5 512 = log 512/log5 by which formula.

Akash said:   9 years ago
If log (a + b)/7 = loga + logb/2 then show that a/b + b/a = 47. Can anyone solve this problem?

Koala said:   9 years ago
It is a basic formula of logarithm.

If,

log(a/b) = log a - log b

log (a.b) = log a + log b

Grace Lancelot said:   9 years ago
From where did log10 - log2 came from?

AMAN SRIVASTAVA said:   9 years ago
Which property of log is used in:- log5 512 = log 512/log 5.

Rita said:   9 years ago
Find the value of log2 + log3?


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