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Instructions: DO NOT USE CALCULATOR. Figures are not drawn to scale. One-fourth of a number is equal to two-fifth of another number. If 50 is added to the larger number, it becomes two times the second number. What is the smaller number?

A. 75
B. 80
C. 100
D. 125
E. none of these
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Explanation: (D) Let X be the larger number and Y be the smaller number. Equation 1: \(\frac{1}{4}X = \frac{2}{5}Y \implies 5X = 8Y\). Equation 2: \(X + 50 = 2Y\). Substituting \(X = \frac{8}{5}Y\) into Equation 2: \(\frac{8}{5}Y + 50 = 2Y \implies 50 = 2Y - \frac{8}{5}Y = \frac{10Y - 8Y}{5} = \frac{2Y}{5}\). So, \(2Y = 250 \implies Y = 125\). The smaller number is 125.