Logarithms : Aptitude Questions and Answers

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Logarithms questions and answers are most important for all competitive exams and entrance tests. In this section, you will find many types of logarithms questions and answers. Practice these questions and answers that will help you crack any competitive exam like SSC, IBPS, PO, RBI, PSC, RAIL, PSU, and many more exams. Now, all competitive exams are online so here you can practice free online exams in our online test section. We are providing many exams logarithms questions with solutions regularly. Check out this page regularly to get updated logarithms questions and answers. Here you will find many other subjects general aptitude questions and answers.

Logarithms Questions and Answers

Q1. If $\mathbf{log_{10}2=0.3010}$ and $\mathbf{log_{10}7=0.8451}$ , then the value of $\mathbf{log_{10}2.8}$ is :

A. 3.4471

B. 2.4471

C. 0.4471

D. 1.4471

SHOW ANSWER

Correct Answer : 0.4471

Q2. The value of $\mathbf{log_{2}16}$ is :

A. 4

B. 8

C. 1/8

D. 16

SHOW ANSWER

Correct Answer : 4

Q3. If log 27 = 1.431, then the value of log 9 is :

A. 0.958

B. 0.934

C. 0.954

D. 0.945

SHOW ANSWER

Correct Answer : 0.954

Q4. If $\mathbf{log2=0.30103}$ , the number of digits in

$\mathbf{2^{64}}$ is :

A. 18

B. 19

C. 20

D. 21

SHOW ANSWER

Correct Answer : 20

Q5. If $\mathbf{log_{10}2=0.3010}$ , the value of $\mathbf{log_{10}5}$ is :

A. 0.6990

B. 0.7525

C. 0.8911

D. 0.3241

SHOW ANSWER

Correct Answer : 0.6990

Q6. If $\mathbf{log_{x}}$ 4 = 0.4, then the value of x is :

A. 32

B. 16

C. 1

D. 4

SHOW ANSWER

Correct Answer : 32

Q7. If $\mathbf{log_{10}2=0.3010}$ , the value of $\mathbf{log_{10}80}$ is :

A. 1.6020

B. 3.9030

C. 3.5080

D. 1.9030

SHOW ANSWER

Correct Answer : 1.9030

Q8. If $\mathbf{log_{a}(ab)=x}$ , then $\mathbf{log_{b}(ab)}$ is :

A. x/1-x

B. x/x-1

C. 1/x

D. x/x+1

SHOW ANSWER

Correct Answer : x/x-1

Q9. If $\mathbf{log_{10}7=a}$ , then $\mathbf{log_{10}(\frac{1}{70})}$ is equal to :

A. 1/10a

B. (1 + a)-1

C. -(1 + a)

D. a/10

SHOW ANSWER

Correct Answer : -(1 + a)

Q10. If $\mathbf{log(0.57)=1.756}$ , then the value of $\mathbf{log57+log(0.57)^{3}+log\sqrt{0.57}}$ $\sqrt{0.57}$ is :

A. 1.902

B. 1.146

C. 0.902

D. 2.146

SHOW ANSWER

Correct Answer : 0.902

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