Practice Questions

<h3>Step-by-Step Calculation</h3><ul><li><b>Calculate Eraser Cost:</b> The cost of one eraser is ₹8. For 5 erasers, the total cost is 5 × ₹8 = ₹40.</li><li><b>Calculate Folder Cost:</b> The cost of one folder is ₹25. For 3 folders, the total cost is 3 × ₹25 = ₹75.</li><li><b>Calculate Total Bill:</b> Add the two subtotals together: ₹40 (erasers) + ₹75 (folders) = ₹115.</li></ul><h4>Key Concepts in Arithmetic Problems</h4><ul><li><b>Order of Operations:</b> While this specific problem involves simple multiplication and addition, always ensure you calculate the cost of each item type (multiplication) before summing the total (addition).</li><li><b>Unitary Method:</b> This problem uses the fundamental unitary method, where the total cost is determined by multiplying the quantity of items by their respective unit prices (Total = Σ (Quantity × Unit Price)).</li><li><b>Accuracy in Exams:</b> In competitive exams like Kerala PSC, speed and accuracy are crucial. Often, candidates make calculation errors in simple multiplication (e.g., miscalculating 3 × 25). Double-checking subtotals before final summation prevents common errors.</li></ul>

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