CAT Practice : Exponents and Logarithms

When we change the base, Log questions become far tougher.

Logarithms - Different bases

    Q.6: log5x = a (This should be read as log X to the base 5 equals a) log20x = b. What is logx10?
    1. (a + b) * 2ab


  • Correct Answer
    Choice A.

Detailed Solution

log5x = a

log20x = b

logx5 =

logx20 =


logx100 - logn5 =

2logx10 - =

logx10 =

logx10 =

Correct Answer:

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More questions from Exponents and Logarithms

  1. Logarithm - Inequalities
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  4. Logartihm - Algebra
  5. Logarithm - Inequalities
  6. Logarithms - Different bases
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