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Ripple Effect is a puzzle in Professor Layton and the Unwound Future.

Puzzle

US Version

The image below is a photograph of the surface of a pond a few moments after somebody threw in a handful of pebbles.

Assuming no pebbles landed in exactly the same spot, how many pebbles were thrown? All of the ripples captured in the photo came from pebbles.

UK Version

This photograph shows the surface of a pond a few moments after somebody threw in a handful of pebbles.

Assuming no pebbles landed in the exact same spot, how many pebbles were thrown? All the ripples captured in the photograph came from pebbles.

Hints




Click a Tab to reveal the Hint.

Ripples that have the same center all came from the same pebble, no matter what size they are.

Here's another way to think about Hint One: the number of pebbles thrown into the pond is equal to the number of center points.

If you think that only four pebbles were thrown in, take a closer look.

Have you notice the largest ripple, for example?

The largest ripple runs from the top to the bottom through the middle of the photo. It's easy to mistake it for a ripple coming from the pebble that landed in the lower-left corner, but in fact it has a different center.

Now, are there any more?


Solution

Incorrect

Too bad!

Try using the Memo function to help you figure out where all of the ripples are coming from.

Correct

US Version

Right answer!

Six pebbles were thrown into the pond.

UK Version

A ripple of applause!

Six pebbles were thrown into the pond.

UF140S

A big thanks to http://professorlayton3walkthrough.blogspot.com

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