Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

Which of these is correct?

**A**

$\text"log"_2(4)$ = $1/{\text"log"_4(2)}$.

**B**

$\text"log"_4(4)$ = 4.

**C**

$\text"log"_5(5)$ = 25.

**D**

$\text"log"(2 + 4 + 5)$ = $\text"log"(40)$.

**Soln.**

**Ans: a**

Speaking factually, $\text"log"_m(n)$ = $1/{\text"log"_n(m)}$, hence the answer. Expressions of the form $\text"log"_m(n) = p$ are same as m^{p} = n. We can see that none of the options makes it correct. Also, log(m + n + p) = log(m × n × p) is possible only if m × n × p = m + n + p.

### Question 2

If log(125) = 3, what is log(25)?

### Question 3

What is x if log_{x}$(2/7)$ = $1/2$?

### Question 4

What is the value of log_{2}(128)?

### Question 5

What is x if log_{x}$(5/2)$ = 1?

### More Chapters | See All...

Decimal Numbers | HCF and LCM | Pipes and Cisterns | Paper Cutting | Square and Cube Roots | Venn Diagrams | Areas | Classification Test | Surds and Indices | Deductive Reasoning | More...

This Blog Post/Article "Logarithms Quiz Set 012" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2019-08-18.