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In simplest form, what type of decimal expansion will ( \frac{35}{42} ) have?

Answer and explanation

Correct answer: Non-terminating recurring

The direct answer is B: non-terminating recurring. First reduce the fraction: \(35/42\) has common factor 7, so \(35/42=5/6\). A fraction in simplest form has a terminating decimal only when its denominator has no prime factors except 2 and 5. Here, \(6=2\times3\), and the factor 3 remains. Therefore its decimal cannot end; division gives \(5\div6=0.8333\ldots\), where 3 repeats forever. Option A, terminating, is wrong because the denominator contains 3. Option B is correct because the decimal continues and repeats. Option C, non-terminating non-recurring, is wrong because every rational fraction has either a terminating or recurring decimal. Option D, integer only, is wrong because \(5/6\) is not a whole number. Remember: after reducing, only 2s and 5s in the denominator mean terminating; any other prime factor means recurring.

Related tags

Number-SystemsDecimal-RepresentationSimplest-Form-Test

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