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A number whose fifth part increased by 4 is equal to its fourth part diminished by 10, is :

A number whose fifth part increased by 4 is equal to its fourth part diminished by 10, is : Correct Answer 280

Let the number be x
Then,
$$\eqalign{ & \Leftrightarrow \left( {\frac{1}{5}x + 4} \right) = \left( {\frac{1}{4}x - 10} \right) \cr & \Leftrightarrow \frac{x}{{20}} = 14 \cr & \Leftrightarrow x = 14 \times 20 \cr & \Leftrightarrow x = 280 \cr} $$

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