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RRB Junior Engineer / DMS / CMA 2019 · Question 1 of 3719

Which of the following fractions is a terminating decimal?

Mathematics - Fractions

  1. Aa. 5/8Correct
  2. Bb. 1/3
  3. Cc. 1/7
  4. Dd. 2/11

Answer: A. a. 5/8

Explanation

Concept-we need to check if the denominator (after simplification) contains only the prime factors 2 and/or 5. A fraction has a terminating decimal if and only if, in its simplest form, the denominator has no prime factors other According to the option=5/8 The denominator 8 can be factored into 23. Since it contains only the prime factor. 5/8 is a terminating decimal.

Source: RRB JE 2019 CBT-1 (24-May-2019 Shift-2) — ixambee compilation with answer key and solutions · reliable-secondary

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