CAT 2017 Slot 2 QA Q34 Progressions & Series

Question 34 of the Quantitative Ability (QA) section, CAT 2017 Slot 2, with CAT's official answer.

If a1 = \(\frac{1}{2 × 5}\) , a2 = \(\frac{1}{5 × 8}\) , a3 = \(\frac{1}{8 × 11}\),...., then a1 + a2 + a3 + ...... + a100 is
  1. A
    \(\frac{25}{151}\)
  2. B
    \(\frac{1}{2}\)
  3. C
    \(\frac{1}{4}\)
  4. D
    \(\frac{111}{55}\)

Answer: (A) 25/151 Progressions & Series MCQ

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