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  9. Q39

ibps-rrb-os1 2017 · Question 39 of 74

6, 4, 5, 11, 39, ?

Simplification/Approximation

  1. A159
  2. B169
  3. C189Correct
  4. D198
  5. ENone of these

Answer: C. 189

Explanation

(6×1)–2 = 4 (4×2)–3 = 5 (5×3) –4 = 11 (11×4) –5 = 39 (39×5) –6 = 189

Source: IBPS RRB PO Prelims 2017 Memory Based Paper (Adda247) · memory-based

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