Numerical Reasoning Tests These numerical reasoning tests contain questions that test your knowledge of Ratios, Percentage Increase/Decrease, Cost and Sales Analysis, Rates and Trends, and Currency Conversions.
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The pre-Columbian settlement at Cahokia was the largest city in North America north of Mexico, with as many as 20,000 people living there at its peak. Credit: Painting by Lloyd K. Townsend. Courtesy of the Cahokia Mounds State Historic Site, Illinois.