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Oct. 16, 2018

October 2018 Puzzle Periodical - Connection Inspection

NSA Puzzle Periodical for October 2018: Connection Inspection

Sept. 18, 2018

September 2018 Puzzle Periodical - The F Sequence

NSA Puzzle Periodical for September 2018: The F Sequence

Sept. 20, 2016

September Puzzle Periodical - Javelin

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

Aug. 17, 2016

August Puzzle Periodical - $50 for All

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

July 19, 2016

July Puzzle Periodical - First or Second?

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

June 21, 2016

June 2016 Puzzle Periodical

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

April 21, 2016

April 2016 Puzzle Periodical

April 2016 Puzzle Periodical; Puzzle created by Andy F., Applied Research Mathematician, NSA

Oct. 2, 2015

October 2015 Puzzle Periodical

October 2015 Puzzle Periodical; Puzzle created by Ben E., Applied Research Mathematician, NSA

Sept. 15, 2015

September 2015 Puzzle Periodical

September 2015 Puzzle Periodical; Puzzle created by Tim C., Applied Research Mathematician, NSA

Aug. 18, 2015

August 2015 Puzzle Periodical

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

July 21, 2015

Announcing NSA's Puzzle Periodical

NSA employees work on some of the world‘s most demanding and exhilarating high-tech engineering challenges. Applying complex algorithms and expressing difficult cryptographic problems in terms of mathematics is part of the work NSA employees do every day. Try your hand at a problem written by a member of our expert workforce.

July 21, 2015

July 2015 Puzzle Periodical

July 2015 Puzzle Periodical; Puzzle created by Stephen C., Applied Research Mathematician, NSA