### Overview

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

- 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.

## Play KENKEN here:

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