GeekDad Puzzle of the Week Solution – Palindromic Products

This week’s puzzle, as previously posted:

The smallest three-digit palindromic product of two, two-digits numbers happens to be a perfect square: 11 x 11 = 121. The largest three-digit palindromic product of two, two-digits numbers is 999 = 37 x 27, and the smallest four-digit palindromic product of two, two-digit numbers is 1001 = 91 x 11. The largest four-digit palindromic product of two, two-digit numbers? 91 x 99 = 9009.

This week’s Geekdad Puzzle of the Week is straightforward: What are the largest and smallest palindromic products of the appropriate set of digit-sizes for each of three, four, and five-digit numbers? Note that like two-digits numbers, above, there may be more than one digit-size applicable.

Congratulations to Blaine for submitting one of the many correct answers to this week’s puzzle. The coveted $50 ThinkGeek Gift Certificate for this week will bear his favored name!

Here is the list of multiplicands and products that fill out each digit combination possible.

Thanks to everyone that reads and participates with these puzzles. Happy puzzling!

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