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144 - Mr. 8:20145 - Time Cards146 - Birds on a Wire

Time Cards is a puzzle in Professor Layton and the Unwound Future.

Puzzle

US Version

The four cards below, zero, one, two, and six, can be used to display different times of the day, as seen in the example 02:16.

If using 24-hour clock, how many different actual times can be created by rearranging the four cards?

You must use all four cards to display each time. The cards can't be overlapped.

UK Version

These four cards, 0, 1, 2 and 6, can be used to display different times of the day, as seen in the example 02:16.

Using the 24-hour clock, how many different times can be displayed by rearranging the four cards?

You must use all four cards to display each time. The cards can't be overlapped.

Hints

Click a Tab to reveal the Hint.

US Version

Just to be clear, in terms of times of day as displayed in this puzzle:

  • There are up to 23 hours.
  • There are up to 59 minutes.
UK Version

You're trying to display times of day, so let's be clear:

  • The hours go up to 23.
  • The minutes go up to 59.

US Version

There's one card that can actually display two different numbers!

UK Version

There's one card that can be used to display two different numbers!

US Version

The six card can be flipped and used as a nine! Better count those times again.

UK Version

The 6 can be flipped and used as a 9! Better count those times again...

The earliest time you can display is 01:26. The latest is 21:09.

US Version

Be careful not to overlook any combinations. Also, be wary of times that don't actually exist.

UK Version

Be careful not to overlook any combinations, and be wary of times that don't actually exit.


Solution

Incorrect

Too bad!

US Version

Consider all of your options carefully.

UK Version

First look at all the conditions, then start eliminating any answers that are impossible.

Correct

That's it!

US Version

Twenty different times of the day can be displayed using the four cards.

Did it take you long to figure out that the six can also be used as a nine?

And, of course, times like 26 o'clock and 60 minutes past the hour don't exist.

UK Version

20 different times can be displayed using the four cards.

Did it take you a while to work out that the 6 can also be used as a 9?

And, of course, times like 26 o'clock and 60 minutes past the hour don't exist.

UF145S
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