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Question

The pq form of 0.¯¯¯¯¯¯18 is ______ (where p and q are integers and q0) .


A

111

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B

211

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C

311

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D

411

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Solution

The correct option is B

211


Given decimal is 0.181818......

Let us assume,

x = 0.181818........ ---(1)

Multiply both sides of (1) by 100

100x = 18.1818.... ---(2)

Subtracting (1) from (2), we get

100x - x =18.1818.... - 0.1818......

99x = 18

x=1899 =211
pq form of the given decimal is 211.


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