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How much do you know about Futoshiki puzzles? Put on your thinking caps and work your way through our quiz.

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Question 1 of 10

Where did Futoshiki puzzles first come from?

South Korea

Japan

Unlike Sudoku, Futoshiki puzzles are actually from Japan.

New Zealand

Question 2 of 10

What does Futoshiki mean?

unequal

In Japanese, "futoshiki" means "unequal."

number logic

greater than

Question 3 of 10

What is Futoshiki also known as?

Sudoku

Hutosiki

While Sudoku and Kakuro are both types of number puzzles, Hutosiki is Futoshiki's alias.

Kakuro

Question 4 of 10

What skill does the Futoshiki puzzle test?

abstract thinking

logic

Futoshiki is at its heart a logic puzzle, meaning you need to employ logic to determine which digit goes into each box.

spatial reasoning

Question 5 of 10

What mathematical signs guide you when filling out a Futoshiki puzzle?

addition signs

division signs

greater-than and less-than signs

The trick to solving a Futoshiki puzzle is obeying the greater-than and less-than signs on the grid.

Question 6 of 10

Which of these is a tactic that can help you solve a Futoshiki puzzle?

AB elimination

Solving a Futoshiki puzzle may require you to identify digit candidates for a particular square, which eliminates those candidates for other squares. This is called AB elimination.

the 45 rule

phone a friend

Question 7 of 10

Which UK newspaper made Futoshiki puzzles popular outside Japan?

The Sun

The Daily Mail

The Guardian

On Sept. 30, 2006, British newspaper The Guardian introduced a futoshiki puzzle feature.

Question 8 of 10

In a 5-by-5 futoshiki square, which digit can you be sure will never appear to the left of a < symbol?

1

3

5

The largest digit in a 5-by-5 futoshiki puzzle is a 5 -- it will never be in a "less-than" square.

Question 9 of 10

Which of the following wouldn't work as a futoshiki puzzle?

a 4-by-5 grid

Futoshiki puzzles must be square for the rules of logic to apply, so a 4-by-5 futoshiki puzzle just doesn't work.

a 6-by-6 grid

a 9-by-9 grid

Question 10 of 10

Which of the following is a possible starting point for a Futoshiki puzzle?

a puzzle with one digit revealed and no inequality symbols included

a puzzle with a revealed digit that's larger than the grid size

a puzzle with no revealed digits but with several inequality signs

Even the most clever puzzler in the world needs a little information to get going. The hardest Futoshiki puzzles keep all digits a secret but include enough inequality symbols to make it possible to solve the riddle.

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