Brainteaser for September 18, 2012

Brainteaser for September 18, 2012 Question: Ms. Arroyo asked the class to see if they could find the sum of the first 50 odd numbers. As everyone settled down to their addition, Terry ran to her and said, "The sum is 2,500." Ms. Arroyo thought, "Lucky guess," and gave him the task of finding the sum of the f irst 75 odd numbers. Within 20 seconds, Terry was back with the correct answer of 5,625. How does Terry find the sum so quickly? Click here to check your answer. Find more Brain Teasers, Puzzles and Games to challenge the mind at The Brainteasers Network

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