Number Systems · Class 9 · CBSE Mathematics

Express 0.36 (with 36 repeating) in the form p/q, where p and q are integers and q neq 0.

Practice question from Number Systems (Class 9 · CBSE Mathematics), with the correct answer and a step-by-step solution.

medium · MCQ · Q-2684D8

Express 0.360.36 (with 36 repeating) in the form p/qp/q, where pp and qq are integers and q≠0q \neq 0.

  1. A.36/99
  2. B.36/100
  3. C.4/11
  4. D.Both A and CCorrect answer

Solution

Let x=0.363636...x = 0.363636... (Equation 1). Multiplying both sides by 100, we get 100x=36.363636...100x = 36.363636... (Equation 2). Subtracting Equation 1 from Equation 2 gives 99x=3699x = 36, so x=36/99x = 36/99. Simplifying by dividing numerator and denominator by 9 gives 4/114/11. Hence both options A and C are correct.

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