Question 17
Writing 2 February 2020 as 02.02.2020 uses four zeros and four twos. How many dates can be written using exactly these eight digits?
Editorial convention: Use DD.MM.YYYY, with a genuine four-digit positive year (1000–9999), as in the source’s list; leading zeros in the year are excluded.
Editorial convention: Use DD.MM.YYYY, with a genuine four-digit positive year (1000–9999), as in the source’s list; leading zeros in the year are excluded.