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What's the minimum number of matches you need to move to make this equation valid? |
What's the minimum number of matches you need to move to make this equation valid? |
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+ | ;US Version |
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+ | Here's a Roman-numeral primer: |
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IX = 9, X = 10, and XI = 11. |
IX = 9, X = 10, and XI = 11. |
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+ | ;UK Version |
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+ | Here's a Roman-numeral refresher: |
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+ | I = 1, II = 2 and III = 3. |
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+ | IIII, however, does not equal 4. |
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+ | IV = 4 and V = 5, so the I in front of the V means one less than five. |
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+ | VI = 6, VII = 7 and VIII = 8. |
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+ | IX = 9, X = 10 and XI = 11. |
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|hint2 = The answer should reveal itself if you understand Hint One and you're willing to look at things from various points of view. |
|hint2 = The answer should reveal itself if you understand Hint One and you're willing to look at things from various points of view. |
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|hint3 = As mentioned in Hing Two, it's important to "look at things from various points of view." In other words, don't be afraid to turn this problem on its head... |
|hint3 = As mentioned in Hing Two, it's important to "look at things from various points of view." In other words, don't be afraid to turn this problem on its head... |
Revision as of 23:18, 8 January 2020
← | 147 - Paving the Garden | 148 - Matchstick Math | 149 - Strange Symbols | → |
Matchstick Math (Mathematchsticks in the UK version) is a puzzle in Professor Layton and the Unwound Future.
Puzzle
- US Version
The math equation below is written in matchsticks! Read as Roman numerals, it means 1 + 11 = 10.
To make this a valid equation, what's the fewest number matches that you need to move?
- UK Version
Here's an equation that's been written using matches. Read as Roman numerals, it means: 1 + 11 = 10.
What's the minimum number of matches you need to move to make this equation valid?
Hints
Solution
Incorrect
Too bad!
There's a twist here somewhere...
Correct
You're on fire!
Zero matches is correct.
If you look at the equation upside down, it becomes 10 = 9 + 1 in Roman numerals.
- US Version
The phrase "fewest number of matches" might have tricked you into thinking "at least one match," but "fewest" can mean no matches at all!
- UK Version
The phrase "minimum number" might have tricked you into thinking "at least one match", but "minimum number" can mean moving no matches at all!
Professor Layton and the Unwound Future | Puzzles in||
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Normal |
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Weekly | See here for weekly puzzles. | |
Hidden Door | ||
Puzzle Index: CV · DB · UF · LS · MM · AL · VS |