logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Logarithm Comments

  • Question
  • If log72 = m, then log4928 is equal to ?


  • Options
  • A. 1/(1+2m)
  • B. (1+2m)/2
  • C. 2m/(2m+1)
  • D. (2m+1)/2m

  • Correct Answer
  • (1+2m)/2 

    Explanation

    log 49 28   =   1 2 log 7 7 × 4

     

    = 1 2 + 1 2 2 log 7 2
    = 1 2 + log 7 2
    1 2   +   m
    1 + 2 m 2 .

  • Tags: GRE, GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst

    Logarithm problems


    Search Results


    • 1. If logx916 = -12, then the value of x?

    • Options
    • A. -3/4
    • B. 3/4
    • C. 81/256
    • D. 256/81
    • Discuss
    • 2. If logaab = x, then logbab = ?

    • Options
    • A. 1/x
    • B. x/(x+1)
    • C. x/(1-x)
    • D. x/(x-1)
    • Discuss
    • 3. If log 2 = 0.30103, Find the number of digits in 256 is

    • Options
    • A. 17
    • B. 19
    • C. 23
    • D. 25
    • Discuss
    • 4. If log 27 = 1.431, then the value of log 9 is

    • Options
    • A. 0.754
    • B. 0.854
    • C. 0.954
    • D. 0.654
    • Discuss
    • 5. If log 2 = 0.3010 and log 3 = 0.4771, the values of log5 512 is

    • Options
    • A. 2.875
    • B. 3.875
    • C. 4.875
    • D. 5.875
    • Discuss
    • 6. Find the logarithm of 144 to the base 23 :

    • Options
    • A. 2
    • B. 4
    • C. 8
    • D. None of these
    • Discuss
    • 7. If logxl+m-2n = logym+n-2l = logzn+l-2m , then xyz is equal to

    • Options
    • A. 0
    • B. 1
    • C. lmn
    • D. 2
    • Discuss
    • 8. If log 64 = 1.8061, then the value of log 16 will be (approx)?

    • Options
    • A. 1.9048
    • B. 1.2040
    • C. 0.9840
    • D. 1.4521
    • Discuss
    • 9. 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
    • 10. The value of 1log360+1log460+1log560is

    • Options
    • A. 0
    • B. 1
    • C. 5
    • D. 60
    • Discuss


    Comments

    There are no comments.

Enter a new Comment