# Logarithm - Aptitude Questions and Answers | Online Logarithm MCQ Aptitude Test

## Logarithm - Aptitude Questions and Answers | Online Logarithm MCQ Aptitude Test

 Quiz Name Logarithm Category Reasoning Number of Questions 15 Time 30 Minutes Exam Type MCQ (Multiple Choice Questions)

1. Which of the statements below is incorrect?
a. log10 10 = 1
b. log (2 + 3) = log (2 x 3)
c. log10 1 = 0
d. log (1 + 2 + 3) = log 1 + log 2 + log 3

2. If log 2 = 0.3010 and log 3 = 0.4771, log5 512 has the value:
a. 2.870
b. 2.967
c. 3.876
d. 3.912

3. log root 8 divided by log 8 equals:
a. 1/ root 8
b. 1/4
c. 1/2
d. 1/8

4. If log 27 = 1.431, the value of log 9 is as follows:
a. 0.934
b. 0.945
c. 0.954
d. 0.958

5. If log a + log b = log (a + b), then b a = log (a + b).
a. a + b = 1
b. a - b = 1
c. a = b
d. a2 - b2 = 1

6. If log10 7 equals a, then log10 1 equals:
a. - (1 + a)
b. (1 + a)-1
c. a/10
d. 1/10a

7. Given that log10 2 = 0.3010, log2 10 equals:
a. 699/301
b. 1000/301
c. 0.3010
d. 0.6990

8. If log10 2 = 0.3010, then log10 80 equals:
a. 1.6020
b. 1.9030
c. 3.9030
d. None of these

9. If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1 = log10 (x + 5) + 1, then x equals:
a. 1
b. 3
c. 5
d. 10

10. 1/log3 60+1/log4 60+ 1/log5 60 is equal to:
a. 0
b. 1
c. 5
d. 60

11.The number of digits in 264 is: 11. If log 2 = 0.30103, the number of digits in 264 is:
a. 18
b. 19
c. 20
d. 21

12. If logx 9/16 = - 1/2, then x equals:
a. -3/4
b. 3/4
c. 81/256
d. 256/81

13.If axe equals by, then:A
a. log a/b =x/y
b. log a/log b=x/y
c. log a/log b=y/x
d. None of these

14. If logx y = 100 and log2 x = 10, the value of y is as follows:
a. 210
b. 2100
c. 21000
d. 210000

15. The value of log2 16 is as follows:
a. 1/8
b. 4
c. 8
d. 16