Champernowne Constant

The Champernowne constant is defined by concatenating consecutive integers: “0.123456789101112…”. The GCF of a set of numbers is the greatest number that divides equally into all numbers in that set (2 is the GCF of 4 and 6 for example). To reduce a fraction to simplest form, you divide the numerator and denominator (top and bottom parts) by the GCF of both the numerator and denominator (reducing 2/6 to simplest form produces 1/3 for example). When the Champernowne constant is rounded to 4 decimal places, it produces the fraction – in simplest form – of 247/2000. Find the fraction in simplest form that is produced when rounding the Champernowne constant to 100 decimal places.

Remember, to solve this puzzle and appear on the leaderboard, email both your solution and your source code (in any language) to Good luck!!

View all puzzles »