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Aug. 21, 2018

August 2018 Puzzle Periodical - Crop Calculations

NSA Puzzle Periodical for August 2018: Crop Calculations

Aug. 17, 2016

August Puzzle Periodical - $50 for All

Can you figure out the correct answer for the August Puzzle Periodical?

Aug. 18, 2015

August 2015 Puzzle Periodical

August 2015 Puzzle Periodical; Puzzle created by Roger B., Cryptanalytic Mathematician, NSA