alleryA rational number has a terminating decimal expansion only when its denominator's prime factors are:
AAny primes
BOdd primes
C2 and 5 only
D3 and 7 only
Answer & Solution
Correct answer: C. 2 and 5 only
1. 0.375 is 3 over 2 cubed.
2. Powers of 10 have only 2 and 5 as factors.
3. So the denominator has only 2s and 5s.
_Source: syllabus Mathematics, Chapter 1, Real Numbers._
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