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Test 13 / 20

A customer buys a toy for $30 (which cost the shopkeeper $20 to stock). The customer pays with a $100 bill. Having no change, the shopkeeper swaps the $100 with a neighbor for smaller bills, then gives the customer $70 change. Later, the neighbor discovers the $100 bill was fake, and the shopkeeper has to pay the neighbor back with $100 in real money. How much did the shopkeeper lose in total?

$170

$70

$50

$90

The Purpose: This exercise measures Analytical Thinking and Financial Logic. It challenges the brain to simplify complex scenarios by focusing on the "Net Flow" of assets rather than getting distracted by multiple transactions.

The Breakdown: To solve this easily, look at who gained what. The neighbor's gain/loss is zero (gave $100, got $100 back). The only person who gained is the customer.

The Calculation: 1. The customer walked away with a toy (worth $20 to the shopkeeper).
2. The customer also walked away with $70 in real change.
3. Total gained by the customer = $20 + $70 = $90.
4. Since the neighbor didn't lose anything, the customer’s gain is the shopkeeper’s direct loss.

Stay Sharp Tip: Solving visual math equations is a fantastic exercise for your brain's Problem-Solving skills. Regular practice with professional Intelligence Quizzes ensures that your mind stays active, helping you maintain mental clarity and cognitive resilience in your daily life.

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Free Logical Reasoning Test: How Sharp Is Your Mind?

This test focuses on pure logical deduction. Instead of complex numbers or visual shapes, you'll solve puzzles based on rules, relationships, and everyday scenarios. It’s an excellent mental workout to improve your analytical skills and keep your decision-making sharp! 🧠

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