logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Logarithm Comments

  • Question
  • Find value of log27 +log 8 +log1000log 120


  • Options
  • A. 1/2
  • B. 3/2
  • C. 2
  • D. 2/3

  • Correct Answer
  • 3/2 

    Explanation

      =   log   3 3   +   log   2 3 +   log   10 3 log 10 × 3 × 2 2  

     

     

     

    = log 3 3   1 2 + log   2 3 + log   10 3 1 2 log ( 10 × 3 × 2 2 )   

     

     

     

     

     

     

     

    = 1 2 log   3 3 + 3   log   2 + 1 2   log 10 3 log 10 + log 3 + log 2 2   

     

     

     

     

     

     

     

    = 3 2 log   3   +   2   log   2   +   log   10 log   3   +   2   log   2   +   log   10  =  3 2   


  • Logarithm problems


    Search Results


    • 1. What is the characteristic of the logarithm of 0.0000134?

    • Options
    • A. 5
    • B. -5
    • C. 6
    • D. -6
    • Discuss
    • 2. For x?N, x>1 , and p=logxx+1 , q=logx+1x+2 then which one of the following is correct?

    • Options
    • A. p < q
    • B. p = q
    • C. p > q
    • D. can't be determined
    • Discuss
    • 3. if logab+logba=loga+b,then

    • Options
    • A. a + b = 1
    • B. a - b = 1
    • C. a = b
    • D. ab=1
    • Discuss
    • 4. If log8x = 313 then find the value of x?

    • Options
    • A. 25
    • B. 32
    • C. 37
    • D. None of these
    • Discuss
    • 5. A fast moving superfast express crosses another pasenger train in 20 seconds. The speed of faster train is 72 km/hr and speeds of slower train is 27 km/h. Also the length of faster ntrain is 100m, then find the length of the slower train if they are moving in the same direction.

    • Options
    • A. 100 m
    • B. 125 m
    • C. 150 m
    • D. 175 m
    • Discuss
    • 6. The Value of logtan10+logtan20+??+logtan890 is

    • Options
    • A. -1
    • B. 0
    • C. 1/2
    • D. 1
    • Discuss
    • 7. The value of 13log10125 - 2log104 + log1032 :

    • Options
    • A. 0
    • B. 1
    • C. 2
    • D. 4/5
    • Discuss
    • 8. If log330 = 1a and log530=1b then the value of 3log302 is:

    • Options
    • A. 3(1+a+b)
    • B. 2(1-a-b)
    • C. 3(1-a-b)
    • D. 3(1+a-b)
    • Discuss
    • 9. Find x if log1218 = log24x + 1. log24x+1 + 4

    • Options
    • A. 0
    • B. 1
    • C. 2
    • D. None of these
    • Discuss
    • 10. The value of x satisfying the following relation: log12x = log23x-2

    • Options
    • A. 1/3
    • B. -1/3
    • C. 3
    • D. None of these
    • Discuss


    Comments

    There are no comments.

Enter a new Comment