Question

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

A
77210
B
13125
C
215
D
1718

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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