# Logarithm Questions and Answers updated daily – Aptitude

12 Logarithm Questions and answers section with explanation for various online exam preparation, various interviews, Aptitude Logarithm online test. Logarithm Questions with detailed description, explanation will help you to master the topic.

## Logarithm Questions

1.
A fast moving superfast express crosses another pasenger train in 20 seconds. The speed of faster train is 72 km/hr and speeds of slower train is 27 km/h. Also the length of faster ntrain is 100m, then find the length of the slower train if they are moving in the same direction.

Correct Ans:150 m
Explanation:

2.    Which of the following statements is not correct?

Correct Ans:log (2 + 3) = log (2 x 3)
Explanation:
log (2 + 3) = log 5

log (2 x 3) = log 2 + log 3

fn_jvn {color{Black} therefore } log (2 + 3) fn_jvn {color{Black} neq}log (2 x 3)

3.     What is the characteristic of the logarithm of 0.0000134?

Correct Ans:-5
Explanation:
log (0.0000134). Since there are four zeros between the decimal point and
the first significant digit, the characteristic is ï¿½5.

4.
The value of log2 16 is:

Correct Ans:4
Explanation:

5. If logx y = 100 and log2 x = 10, then the value of y is:

Correct Ans:2100
Explanation:

6. If log 2 = 0.30103, the number of digits in 264 is:

Correct Ans:20
Explanation:

7. If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1, then x is equal to:

Correct Ans:3
Explanation:

8. If log10 2 = 0.3010, the value of log10 80 is:

Correct Ans:1.9030
Explanation:

9. If log10 2 = 0.3010, then log2 10 is equal to:

Correct Ans:1000/301
Explanation:

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

Correct Ans:0.954
Explanation:

11.   If log 2 = 0.3010 and log 3 = 0.4771, the value of log5 512 is:

Correct Ans:3.876
Explanation:

12. Which of the following statements is not correct?