There are several interesting and challenging variations on KenKen puzzles. One, which is available on mathdoku.com, is no-op KenKen, in which the total for each bolded box is given, but not the operation, so that the player of the puzzle needs to figure out not just the entries, but what operation to use to get the right entry.
In this lecture we will talk about a different variation, in which the numbers used are changed but the operation is still given. In our example puzzle we will use only the even numbers from 1 to 8, that is, the numbers 2,4,6,8.
We start with this puzzle (it might seem familiar from the last lecture). Can you use the rules of KenKen to figure out how to solve the puzzle? Click to figure out if you were correct.