**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

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