Explanation: Given \(x = 10y + 4\). When \(x\) is divided by \(5\): \(x/5 = (10y + 4)/5 = 10y/5 + 4/5 = 2y + 4/5\). Since \(10y\) is divisible by \(5\), the remainder when \(x\) is divided by \(5\) is the remainder when \(4\) is divided by \(5\), which is \(4\).
