1. Tetsuya Miyamoto
   Kenneth Kennedy
2. Will Shortz

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

1. crossword puzzles
   Jumble
2. sudoku

KenKen puzzles are often compared to sudoku puzzles.

1. nothing
   double math
2. wisdom squared

<i>Ken</i> means wisdom in Japanese, so "KenKen" roughly translates to wisdom squared.

1. No math skills are needed, just logic.
   You need to know algebra.
2. You need to know basic arithmetic.

Basic arithmetic skills are needed to solve KenKen puzzles.

1. Kenerator
   Knumber Kruncher
2. Ken Koder

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

1. The New York Times
   The Times (UK)
2. The Japan Times

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

1. Nextoy
   Hasbro
2. Mattel

Nextoy, LLC began marketing the puzzle worldwide in 2008.

1. Mental Floss
   Reader's Digest
2. Scientific American

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

1. David Hoyt
   Bobby Fischer
2. Will Shortz

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

1. 3-by-3 to 9-by-9
   4-by-4 to 8-by-8
2. 5-by-5 to 9-by-9

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

1. coops
   cages
2. corrals

The outlined boxes within each KenKen grid are called cages.

1. only addition or subtraction
   only multiplication or division
2. addition, subtraction, multiplication or division

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

1. You cannot use any number more than twice in any row or column.
   Numbers cannot be repeated in any row or column.
2. Numbers cannot be repeated in rows, but they can be repeated in columns.

Numbers cannot be repeated in any row or column.

1. no
   Yes, each puzzle has two correct answers.
2. Yes, each puzzle has the same number of correct answers as its corresponding number of grids.

Each puzzle has only one correct answer.

1. 0, 1, 2, 3
   1, 2, 3, 4
2. 1, 2, 4, 8

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

1. 5 students
   20 students
2. 50 students

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

1. He teaches philosophy and logic.
   He does not teach his students.
2. He teaches his students math and science.

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.

1. three
   six
2. nine

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

1. Larger-grid puzzles are usually harder than the smaller-grid puzzles.
   Yes, the larger the grid, the harder the puzzle.
2. No, size has no relation to degree of difficulty.

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

1. Solve cages with an even number of boxes first.
   Fill in any one-box cages first.
2. Focus on cages with prime numbers because they have a limited number of possible solutions.

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