Logarithm MCQs : This section focuses on the "Logarithm". These Multiple Choice Questions (MCQs) should be practiced to improve the Logarithm skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
If log 27 = 1.431, then the value of log 9 is:
A. 0.934
B. 0.945
C. 0.954
D. 0.958
Question 2
If log(a/b) + log(b/a) = log (a + b), then:
A. a + b = 1
B. a - b = 1
C. a = b
D. None of the above
Question 3
If log 2 = 0.30103, the number of digits in 2^64 is:
A. 18
B. 19
C. 20
D. 21
Question 4
The value of log2 16 is:
A. 1/8
B. 4
C. 8
D. 16
Question 5
Which of the following statements is not correct?
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
Question 6
If log 2 = 0.3010 and log 3 = 0.4771, the value of log5 512 is:
A. 2.870
B. 2.967
C. 3.876
D. 3.912
Question 7
log root(8)/log 8 is equal to:
A. 1/ root(8)
B. 1/4
C. 1/2
D. 1/8
Question 8
If log a/b + log b/a = log (a + b), then:
A. a + b = 1
B. a - b = 1
C. a = b
D. a^2 - b^2 = 1
Question 9
If log10 7 = a, then log10 (1/70) is equal to:
A. - (1 + a)
B. (1 + a)^(-1)
C. a/10
D. 1/10a
Question 10
If log10 2 = 0.3010, then log2 10 is equal to:
A. 699/301
B. 1000/301
C. 0.3010
D. 0.6990
Question 11
If log10 2 = 0.3010, the value of log10 80 is:
A. 1.6020
B. 1.9030
C. 3.9030
D. None of these
Question 12
If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1, then x is equal to:
A. 1
B. 3
C. 5
D. 10
Question 13
The value of (1/log3 60 + 1/log4 60 + 1/log5 60) is:
A. 0
B. 1
C. 5
D. 60
Question 14
If logx (9/16) = -1/2 , then x is equal to:
A. -(3/4)
B. 3/4
C. 81/256
D. 256/81
Question 15
If a^x = b^y, then:
A. log a/b = x/y
B. log a/ log b= x/y
C. log a/ log b= y/x
D. None of these
Question 16
If logx y = 100 and log2 x = 10, then the value of y is:
A. 2^10
B. 2^100
C. 2^1000
D. 2^10000