Digit Sums

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Which numbers have digits that add up to a given number?


For example, consider all two-digit numbers and a target digit sum of 10. The solution is {19, 28, 37, 46, 55, 64, 73, 82, 91}.


Contributed by: Bhuvanesh Bhattand Arnoud Buzing (March 2011)
Open content licensed under CC BY-NC-SA




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