Railways PYQCBT 2 2017

RRB NTPC · Question 76

3.0 × 0.3 × 0.03 × 0.003 = ?

  1. 81 × 10^-4

  2. 81 × 10^-7

  3. 81 × 10^-5

  4. 81 × 10^-6

Show answer & explanation

Answer: (D) 81 × 10^-6

Explanation

3 × 0.3 × 0.03 × 0.003 = 3⁴ × 10⁻⁶ = 81 × 10⁻⁶.