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Tricky Digits is a puzzle in Professor Layton and the Diabolical Box.
Puzzle
Two cards sit on a table. Each has a different single-digit number written on it. When set side by side, they form a two-digit number. Then, by flipping their order, you can make another two-digit number. Adding the total from these two two-digit numbers gives you one of the totals shown below. Which one is it?
Hints
Solution
Incorrect
Too bad!
- US Version
Think hard about the clues you've been given and try again.
- UK Version
Think hard about the puzzle and try again.
Correct
Good job!
- US Version
12+21=33
35+53=88
As you can see, the sum of two two-digit numbers with inverted digits is always a multiple of 11. Of the six options presented, the only multiple of 11 is 44.
- UK Version
12 + 21 = 33
35 + 53 = 88
As you can see, the sum of two two-digit numbers with inverted digits is always a multiple of 11. Of the six options presented, the only multiple of 11 is 44.
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