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Railways PYQCBT 1 2016

RRB NTPC · Question 19

Find the value of y(y^4 - y^2 - y) when y = 5.

  1. 2900

  2. 2975

  3. 2925

  4. 2995

Show answer & explanation

Answer: (B) 2975

Explanation

With y = 5: y⁴ = 625 and y² = 25, so y⁴ − y² − y = 625 − 25 − 5 = 595. Multiplying by y: 5 × 595 = 2975.