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Five Stamps is a puzzle in Professor Layton and the Unwound Future.

## Puzzle

US Version

The five numerical stamps shown below are designed to fill in the four blank squares and complete the equation. Only one digit can be used in each square.

Your task is to make a valid equation using the fewest number of stamps to fill all four blank squares.

Pick the stamps you'll use by checking the boxes below them, and then tap Submit.

UK Version

Here are five numbered stamps.
Stamp the numbers into the blank spaces to complete the equation. Only one digit can fit into each blank space, and you must use the lowest possible number of stamps.

Select the stamps that you need to use, then touch Submit.

## Hints

Click a Tab to reveal the Hint.

US Version

You need to add up three single-digit numbers to equal a single-digit number.

Think of all the possible equations you can create with the five stamps.

UK Version

You need to add up three single-digit numbers to get another single-digit number.

Think of all the ways you could do this using the five numbers on the stamps.

US Version

It might sound simple, but when trying to figure out how to use the fewest number of stamps, don't forget that if you use the same stamp multiple times, it still only counts as one stamp.

UK Version

Remember that you need to use the lowest possible number of stamps to complete the equation. Using the same stamp more than once reduces the total number of stamps that you use.

US Version

Three, four, five, six, seven...

This puzzle can't be completed using just these five numbers. Remember, though, that you're not writing the numbers--you're stamping them. So be sure to consider all of the different ways you can use each stamp.

UK Version

You can't make the equation work out using the five numbers:
3, 4, 5, 6, 7

Be aware that you're using stamps, not writing the numbers.
See if you can use the stamps in different ways to produce different numbers.

US Version

There's no up, down, left, or right to the stamps, despite what you may think.

There's only one stamp, however, that can be rotated 180 degrees to create a different number. If you use the stamp as the answer to the equation, you should solve this puzzle in no time!

UK Version

These stamps don't have a defined top, bottom, right or left.

One of the five stamps can be rotated 180 degrees to produce a different number. If you put that number on the right side of the equation, then you'll have no trouble working out what goes on the left.

## Solution

### Incorrect

US Version

Take a close look at all five stamps.

UK Version

Take a close look at all five stamps.

### Correct

US Version

Correct!

The three and six stamps are all you need! If you turn the six around, it can make a nine. And to equal nine, you simply use the three stamp three times in a row and you're done!

UK Version

That's right!

The stamps you need to use are 3 and 6.

If you rotate the 6 stamp, you can use it as a 9. You can then use the 3 stamp three times, so you can complete this equation using only two stamps.

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