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Do you slaughter the daily sudoku grid? Turn crossword puzzles into carnage? See how much you know about one of the newest strategy-based brain teaser games called KenKen.

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Question 1 of 20

Who invented KenKen puzzles?

Tetsuya Miyamoto

Japanese math teacher Tetsuya Miyamoto created the first KenKen puzzle in 2004.

Kenneth Kennedy

Will Shortz

Question 2 of 20

KenKen is similar to what other popular puzzle?

crossword puzzles

Jumble

sudoku

KenKen puzzles are often compared to sudoku puzzles.

Question 3 of 20

What does the name "KenKen" mean?

nothing

double math

wisdom squared

*Ken*means wisdom in Japanese, so "KenKen" roughly translates to wisdom squared.

Question 4 of 20

Do you need to have a lot of math skills to solve a KenKen puzzle?

No math skills are needed, just logic.

You need to know algebra.

You need to know basic arithmetic.

Basic arithmetic skills are needed to solve KenKen puzzles.

Question 5 of 20

What is the name of the computer program that creates KenKen puzzles?

Kenerator

The computer program that creates today's KenKen puzzles is called the Kenerator.

Knumber Kruncher

Ken Koder

Question 6 of 20

In which newspaper did KenKen puzzles first appear daily?

The New York Times

The Times (UK)

The Times (UK) first began publishing KenKen puzzles daily in March 2008.

The Japan Times

Question 7 of 20

Which company began marketing KenKen worldwide?

Nextoy

Nextoy, LLC began marketing the puzzle worldwide in 2008.

Hasbro

Mattel

Question 8 of 20

Which was the first American magazine to run KenKen puzzles?

Mental Floss

Reader's Digest

In 2009, Reader's Digest became the first U.S. magazine to publish a KenKen puzzle.

Scientific American

Question 9 of 20

Which U.S. puzzle guru helped popularize KenKen?

David Hoyt

Bobby Fischer

Will Shortz

Will Shortz has been the editor of The New York Times' crossword puzzle since 1993.

Question 10 of 20

What grid sizes are used in KenKen puzzles?

3-by-3 to 9-by-9

KenKen puzzle grids must be at least 3-by-3 and no larger than 9-by-9.

4-by-4 to 8-by-8

5-by-5 to 9-by-9

Question 11 of 20

What are the outlined boxes within the puzzles called?

coops

cages

The outlined boxes within each KenKen grid are called cages.

corrals

Question 12 of 20

What math function might be specified in each cage?

only addition or subtraction

only multiplication or division

addition, subtraction, multiplication or division

Each cage might specify the use of addition, subtraction, multiplication or division.

Question 13 of 20

What is the rule regarding repeating numbers?

You cannot use any number more than twice in any row or column.

Numbers cannot be repeated in any row or column.

Numbers cannot be repeated in any row or column.

Numbers cannot be repeated in rows, but they can be repeated in columns.

Question 14 of 20

Can there be more than one answer to a KenKen puzzle?

no

Each puzzle has only one correct answer.

Yes, each puzzle has two correct answers.

Yes, each puzzle has the same number of correct answers as its corresponding number of grids.

Question 15 of 20

Which numbers are used to solve a 4-by-4 puzzle?

0, 1, 2, 3

1, 2, 3, 4

Numbers one, two, three and four are used to solve a 4-by-4 puzzle.

1, 2, 4, 8

Question 16 of 20

KenKen creator Tetsuya Miyamoto runs a popular year-long weekend class that accepts how many students?

5 students

20 students

Miyamoto's school accepts only the first 20 students who apply.

50 students

Question 17 of 20

What kind of instruction does Miyamoto give his students?

He teaches philosophy and logic.

He does not teach his students.

Miyamoto does not give any formal instruction to his students; he believes people learn better by solving puzzles on their own, thus exercising their brains.

He teaches his students math and science.

Question 18 of 20

How many puzzles can you play each day at KenKen.com?

three

six

There are six new puzzles of varying difficulty each day on KenKen.com.

nine

Question 19 of 20

Are larger-grid puzzles harder to solve than smaller-grid puzzles?

Larger-grid puzzles are usually harder than the smaller-grid puzzles.

In general, larger-grid puzzles are harder than smaller-grid puzzles, but that's not always the case.

Yes, the larger the grid, the harder the puzzle.

No, size has no relation to degree of difficulty.

Question 20 of 20

Which of the following is NOT a good tip if you're having difficulty solving a KenKen puzzle?

Solve cages with an even number of boxes first.

Cages with even numbers of boxes aren't necessarily easier to solve than cages with an odd number of boxes.

Fill in any one-box cages first.

Focus on cages with prime numbers because they have a limited number of possible solutions.

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