Yes, you can look at the one dollar bill and answer this question: how many times does the word or number "1" appear on every U.S. one dollar bill?

It's a fun piece of trivia that our most common banknote is filled with repetitions of its value in both word and number form. A careful examination of a U.S. one-dollar bill reveals that the number "1" and the word "one" appear a total of sixteen times. This repetition is a key feature of the bill's design, intended to make its denomination clear and difficult to counterfeit.

On the front of the bill, you can spot the numeral "1" in each of the four corners. Additionally, the phrase "ONE DOLLAR" is printed at the bottom, and the word "ONE" appears in large type under the Treasury Department's seal. This brings the count on the front to six. The back of the bill features the word "ONE" prominently in the center. The corners of the back also have the numeral "1" with the word "ONE" superimposed over it, accounting for eight more instances (four of each).

Finally, a more subtle inclusion is within the Latin phrase "E Pluribus Unum," which is written on the ribbon held in the eagle's beak on the back of the bill. This phrase, meaning "Out of many, one," adds the last appearance of the word "one." The intricate design of the one-dollar bill, which includes elements of the Great Seal of the United States, is the oldest of all U.S. currency currently produced. The various design elements, including the frequent repetition of its value, all contribute to its security and recognizability.