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Question

Which of the following rational number represents a terminating decimal expansion?


A
77210
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B
13125
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C
215
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D
1718
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Solution

The correct option is A $$
\dfrac { 13 } { 125 }
$$
Any rational number its denominator is in the form of $$2^m\times 5^n$$, where $$m,n$$ are positive integer s are terminating decimals.

Solution is $$B$$ as $$A$$ is non terminating decimals.
$$A =\dfrac{77}{210}= 0.366......$$

$$B =\dfrac{13}{125}= 0.104$$

$$C =\dfrac{2}{15}= 0.133.....$$

$$D =\dfrac{17}{18}=  0. 9444....$$

Mathematics

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