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139 - Bricks 'n' Bullion140 - Ripple Effect141 - A Roll of the Die

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.

US Version

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

UK Version

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

US Version

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.

UK Version

Here's another way to think about Hint 1: the number of pebbles thrown into the pond is equal to the number of centres.

US Version

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

Have you noticed the largest ripple, for example?

UK Version

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

Have you noticed the largest ripple, for example?

US Version

The largest ripple runs from top to 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?

UK Version

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

Now, are there any more?


Solution

Incorrect

Too bad!

US Version

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

UK Version

Try using the Memo Function to help you work out where all 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
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