If \(x\) is an integer that lies between \(25\) and \(500,\) for how many values of \(x\) is \(\dfrac{x}{20}\) the squar

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If \(x\) is an integer that lies between \(25\) and \(500,\) for how many values of \(x\) is \(\dfrac{x}{20}\) the square of an integer?

A. 2
B. 3
C. 4
D. 5
E. More than 5

Answer: B

Source: e-GMAT
Source: — Problem Solving |