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Question
Classify the following number as rational or irrational with justification:
`sqrt(28)/sqrt(343)`
Solution
`sqrt(28)/sqrt(343) = sqrt(2 xx 2 xx 7)/sqrt(7 xx 7 xx 7)`
= `(2sqrt(7))/(7sqrt(7))`
= `2/7`
Hence, it is a rational number.
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