Logarithm – Aptitude Questions and Answers | Online Logarithm MCQ Aptitude Test

Logarithm – Aptitude Questions and Answers | Online Logarithm MCQ Aptitude Test

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer

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

Show Answer