Ten-Cent Increments is a weekly puzzle in Professor Layton and the Unwound Future.


Below are 10 stamps with values of 10 cents, 100 cents (one dollar), and every 10-cent increment in between.

Your task is to purchase the four stamps that, when used in any combination, can create every 10-cent increment from 10 up to the highest possible value.

The examples below show four potential combinations, but not the answer.

Which four stamps should you buy?


Click a Tab to reveal the Hint.

The highest possible value you'll be able to create with the correct four stamps is 150.

That's using all four stamps, of course so which four would that be?



Too bad!

You thought you had it, didn't you? Clear your mind, and try again.


First class!

With the 10-, 20-, 40-, and 80-cent stamps, you can create every 10-cent increment from 10 up 150!

Go ahead and check the math above.


A big thanks to

Community content is available under CC-BY-SA unless otherwise noted.