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.

Michael Essandoh said:   9 years ago
Please solve this, given that log 9 = 0.9542 and log 6 = 0.7781, find the value of log base 10 of 225.

Shreyash said:   9 years ago
@Arban.

Whenever base is not mentioned, it is taken as 10.
So, log 10 =1 (as the base here is 10).

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

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?

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

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?

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

Please solve this.

Shakti said:   6 years ago
Sir is there any methods to solve 2709/699.
It is complicated to solve soo.

Sumeet said:   1 decade ago
If log(10/2) = log5, then log(512/5) should be equal to log(9/1). Isn't it?

Stella said:   5 years ago
Hi, I am confused about the second step please help me and explain more.


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