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Daily Express, Mensa Teaser

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DavidHulme | 12:52 Mon 11th Feb 2013 | Crosswords
4 Answers
Which number is the odd one out?
the one that stands out is 255(1) being an odd number at the end, but I think this is to easy
2551, 3774, 2958, 4590, 1224 and 1836
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Multiply first two numbers by 2 to give last 2 numbers.
Question Author
Thank you, johnalex
does not work for the first one .
Hello This Is David From Cardiff!

I think I have the answer. For each four digit number make two columns.
The first column is the 3rd minus the 1st digit. The 2nd column is the 2nd minus the 4th digit. When rearranged this gives:-

3 1
+1 2 2
+2 4 3
+1 3 4
+2 5 5

So the odd one out is 1224!

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