# Mathdoku

### Overview

KENKEN is Sodoku with Math

Think of Kenken as Mathdoku. It’s an arithmetic and logic puzzle (like sudoku), except that to produce a certain target number you need to combine numbers using a specified mathematical operation.

### Rules

• For a 3×3 puzzle, fill in with numbers 1-3
• For a 4×4 puzzle, fill in with numbers 1-4
• For a 5×5 puzzle, fill in with numbers 1-5
• For a 6×6 puzzle, fill in with numbers 1-6
• For a 7×7 puzzle, fill in with numbers 1-7
• For a 8×8 puzzle, fill in with numbers 1-8
• For a 9×9 puzzle, fill in with numbers 1-9
• Do not repeat a number in any row or column
• The numbers in each heavily outlined set of squares, called cages,
must combine (in any order) to produce the target number in the top
corner of the cage using the mathematical operation indicated.
• Cages with just one box should be filled in with the target number
in the top corner.
• A number can be repeated within a cage as long as it is
not in the same row or column.

## What You’ll Need

Sample Completed Kenken board

• Understanding of how to do the mathematical operations
like adding, subtracting, multiplication, and division.

### How To

• First go through and fill in the single boxes.
• Then fill in the rows or columns with the least amount of open boxes.

### Why You Should Try This

• Helps you train your brain to calculate numbers in your head
• Helps you understand and be able to do math better.

### Where’s the Math?

This activity addresses the following Texas Essential Knowledge Standards :

• (3.3.b) select addition or subtraction using the operation to solve problems involving whole numbers through 999.
• (3.4.a) learn and apply multiplication facts through 12 by 12 using concrete models and objects.