For The Mathematically Inclined

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Problems from 12/01/16

Problem 1
What is the tenth term of the geometric sequence if the first term is 5 and the common ratio is 2?

Solution:

Problem 2
At the 1998 Winter X-Games held in Crested Butte, Colorado, Jennie Waara, from Sweden, won the womenâ€™s snowboarding slope-style competition. Suppose that in one of the qualifying races, Ms. Waara traveled 5 feet in the first second, and the distance she traveled increased by 7 feet each subsequent second. If Ms. Waara reached the finish line in 15 seconds, how far did she travel?

Solution:

Congratulations to Ramachandran Balakrishna, Kishore Balsara and Avanish Gowrishankar, who were the winners of the last set of puzzles.