RULES FOR KENKEN Fill the grid with digits so as not to repeat a digit in any row or column, and so the digits within each heavily outlined box or boxes (called a cage) will produce the target number shown in that cage by using the operation (addition, subtraction, multiplication, or division) shown by the symbol after the numeral. For single box cages, simply enter the number that is shown in the corner. So, for example, the notation 6+ means that the numerals in the cage should add up to 6, an