However, unlike SuDoku, instead of blocks, KenKen logic puzzles contain various groups of boxes called "cages" and in the upper left-hand corner of each cage is a target number and a mathematical sign indicating how the numerals within a particular cage interact to produce the target number.
For this tutorial we'll begin with an easy 4x4 grid with 8 "cages". We have to fill the squares with the numbers 1 through 4 so that no number repeats in any row or column (just as in a SuDoku puzzle) while meeting the target number of each "cage".
(Please note! A number may repeat within a cage as long as it does not repeat in any row or column.)