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Nov. 8, 2024

Headline Puzzle 60th Anniversary: November 2024

This month marks the 60th anniversary of Headline Puzzles at NSA! In honor of the puzzle’s Diamond Jubilee, here is a special November Headline Puzzle, based on headlines from November 1964. Each of the five is a different letter-for-letter substitution. All five are derived from the same mixed alphabet at different settings against itself. 

Aug. 21, 2018

August 2018 Puzzle Periodical - Crop Calculations

NSA Puzzle Periodical for August 2018: Crop Calculations

July 17, 2018

July 2018 Puzzle Periodical - Marble Math

NSA Puzzle Periodical for July 2018: Marble Math

June 19, 2018

June 2018 Puzzle Periodical - Mug Math

NSA Puzzle Periodical for June 2018: Mug Math

May 15, 2018

May 2018 Puzzle Periodical - Shall We Play a Game? Computer Tic-Tac-Toe

NSA Puzzle Periodical for May 2018: Computer Tic-Tac-Toe

April 17, 2018

April 2018 Puzzle Periodical - 'APRIL = MATH'

April 2018 NSA Puzzle Periodical - 'APRIL = MATH' - Mathematics and Statistics Awareness Month Challenge by Benjamin E.

March 20, 2018

March 2018 Puzzle Periodical - a, b, c - Variable Alphabet Equation

March 2018 NSA Puzzle Periodical - a, b, c - Variable Alphabet Equation by Wendell W.

Feb. 20, 2018

February 2018 Puzzle Periodical - A Plethora of Penguins

February 2018 Puzzle Periodical; Puzzle created by David B., NSA Mathematician

Jan. 16, 2018

January 2018 Puzzle Periodical - Snow Manipulation

January 2018 Puzzle Periodical; Puzzle created by James M., NSA Operations Researcher

Dec. 19, 2017

December 2017 Puzzle Periodical - Reindeer Games!

December 2017 Puzzle Periodical - Reindeer Games; Puzzle created by Benjamin E., NSA Mathematician