Find the missing number.” The puzzle features a few numbers in a 3*4 grid. Puzzle enthusiasts need to analyse the pattern and find the number that should replace the question mark.

For instance, the button pattern on this smart calculator is somewhat similar to what you see on a Casio or Citizen calculator. However, there are subtle changes that are unique to this calculator.

number theory Mathematicians Catch a Pattern by Figuring Out How to Avoid It We finally know how big a set of numbers can get before it has to contain a pattern known as a “polynomial progression.” ...