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Question

Express the following in the form pq, where p and q are integers and q ≠ 0.
0.¯¯¯¯¯¯¯¯001

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Solution

Let x=0.¯¯¯¯¯¯¯¯001


i.e. x=0.001001001..(1)


Multiplying (1) by 1000, we get


1000x=1.001001(2)


Subtracting (1) from (2), we get


1000xx=(1.001001)(0.001001)


999x=1


x=1999


Thus 0.¯¯¯¯¯¯¯¯001=1999

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