Sunday Times Teaser 3118 – Product Dates
by Edmund Marshall
Published Sunday June 26 2022 (link)
If a date during the current millennium is day D in month M during year (2000+N), it is said to be a product date if the product of D and M equals N (for example 11 February 2022). My daughter and I have been investigating the numbers of days from one product date to the next product date. I was able to establish the longest such interval L, while my daughter worked out the shortest such interval S. We were surprised to find that L is a whole number multiple of S.
What is that multiple?