CAT Quant Practice Problems

Question: \(\left( {\frac{1}{{{2^2} - 1}}} \right) + \left( {\frac{1}{{{4^2} - 1}}} \right) + \left( {\frac{1}{{{6^2} - 1}}} \right) + ... + \left( {\frac{1}{{{{20}^2} - 1}}} \right)\)
  1. \(\frac{9}{{19}}\)
  2. \(\frac{{10}}{{19}}\)
  3. \(\frac{{10}}{{21}}\)
  4. \(\frac{{11}}{{21}}\)

Correct Option:3

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