Question
Two-third of a positive number and `25/216` of its reciprocal are equal. The number is :
Answer: Option A
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Let the number be `x`.
Then, `2/3 x` = `25/216 xx 1/x` `hArr` `x^2` = `25/216 xx 3/2` = `25/144` `hArr` `x` = `sqrt(25/144)` = `5/12`
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