June 19, 2018
June 2018 Puzzle Periodical - Mug Math
NSA Puzzle Periodical for June 2018: Mug Math
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.