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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