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Railways PYQCBT 2 2017

RRB NTPC · Question 16

Which one of the following has a terminating decimal expansion?

  1. 1/6

  2. 17/25

  3. 10/3

  4. 1/11

Show answer & explanation

Answer: (B) 17/25

Explanation

A fraction in lowest terms terminates only if its denominator has no prime factors other than 2 and 5. 25 = 5², so 17/25 = 0.68 terminates. Denominators 6, 3 and 11 give recurring decimals.