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How the Bells Toll is a puzzle in Professor Layton and the Last Specter.

Puzzle

US Version

Below are three bells, each of which has one red and one blue hammer attached.

Beneath each bell is a counter, and each one is rigged such that its count will increase according to certain rules whenever the bell above it is struck.

The counters have already reached the numbers shown below. Can you figure out how to use the red and blue hammers to ring the bells and make all three counters display the same number?

UK Version

Below are three bells, each of which has one red and one blue hammer attached. Beneath each bell is a counter, and the bells are rigged such that the count increases according to certain rules whenever the bell is struck.

The counters are already at the values shown below. Can you use the red and blue hammers to make all three counters display the same number?

Hints




Click a Tab to reveal the Hint.

Each time you ring a bell with a red or blue hammer, the counter goes up by a fixed amount. Try to work out these amounts by using each hammer and noting the outcome.

US Version

Regardless of the bell, the same-colored hammer will always increase the counter by the same amount.

If you ring the bells and watch the counters carefully, you should be able to work out the function of each hammer.

UK Version

Regardless of the bell, hammers of the same colour will always increase a counter by the same amount.

Observe carefully and you will soon work out the function of each hammer.

There is a way to make all three numbers match in just six moves.

US Version

Once you work out the pattern, look for the simplest possible method of reaching the same number on each counter.

UK Version

Once you work out the pattern, you need only look for the simplest possible method.

The lowest common value for all three bells is 16.

US Version

Now that you have a goal set for you, all that's left to do is work out which hammers to hit in order to reach it.

UK Version

Now that you have a goal set for you, all that's left is to work out which hammers to hit in order to reach it.


Solution

Correct

US Version

Ding, ding, ding!

Each time you strike a bell with a red hammer, its counter goes up by 3. If you strike a bell with a blue hammer, its counter goes up by 4.

UK Version

Ding ding ding!

Each time you strike a bell with a red hammer, the counter goes up by 3. If you strike it with a blue hammer, it goes up by 4.

LS077S

A big thanks to http://professorlayton4walkthrough.blogspot.com

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