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Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.The Association of Teachers of Mathematics

The digits of the year 2000 add up to 2, 2001 add up to 3, 2002 add up to 4 but this will also happen in 2011. Find all the years when the digits add up to 4, 5, ...

Answer: 2101, 2110; 2003, 2030, 2300, 2012, 2021, 2102, 2120, 2201, 2210, 2111


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