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Quantitative Aptitude

LOGARITHM MCQs

Logarithms

Total Questions : 289 | Page 2 of 29 pages
Question 11.

If log10 7 = α , then  solve   log10 \(\left(\frac{1}{70}\right)\)

  1.     – (1 + a )
  2.    (1 + a )
  3.     (1  – a )
  4.    none of these
 Discuss Question
Answer: Option A. ->  – (1 + a )
Question 12.

If log 27 =  1.431 , find  the value of log 9  .

  1.    0.934
  2.    0.945
  3.    0.954
  4.    0.958
 Discuss Question
Answer: Option C. -> 0.954
Question 13.

If  log 10  2 = 0.3010, then find  log2 10 .

  1.    \(\frac{500}{301}\)
  2.    \(\frac{750}{301}\)
  3.    \(\frac{1000}{301}\)
  4.    \(\frac{1250}{301}\)
 Discuss Question
Answer: Option C. -> \(\frac{1000}{301}\)
Question 14.

If log10 2 = 0.3010, then find  log10 5 .

  1.    0.3241
  2.    0.6911
  3.    0.6990
  4.    0.7525
 Discuss Question
Answer: Option C. -> 0.6990
Question 15.

If log 3 = 0.477 and (1000)x = 3 , find the value of x

  1.    0.0477
  2.    0.159
  3.    0.1300
  4.     none of these
 Discuss Question
Answer: Option B. -> 0.159
Question 16.

If log 2 = 0.3010 and  log 3 = 0.4771 , find  the value of log5  512

  1.    2.870
  2.    2.967
  3.    3.876
  4.    3.912
 Discuss Question
Answer: Option C. -> 3.876
Question 17.

If log10 2 = 0.3010and log10 7 = 0.8451 , then find  the value of  log10  2.8  .

  1.    0.4471
  2.    1.4471
  3.    2.4471
  4.    none of these
 Discuss Question
Answer: Option A. -> 0.4471
Question 18.

Simplify :   \(\left(log\frac{75}{16}-2 log\frac{5}{9}+log\frac{32}{243}\right)\)

  1.    log 2
  2.    log 3
  3.    log 4
  4.    log 5
 Discuss Question
Answer: Option A. -> log 2
Question 19.

If log ( 0.57) = \(\overline{1}\).756 , then the value of log 57 + log ( 0.57 ) 3  + log  \(\sqrt{0.57}\)

  1.    0.209
  2.    0.029
  3.    0.902
  4.    none of these
 Discuss Question
Answer: Option A. -> 0.209
Question 20.

If log 2 = 0.30103, then find number of digits in 264  .

  1.    19
  2.    20
  3.    21
  4.    22
 Discuss Question
Answer: Option B. -> 20

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