#899 · Combinatorics · Counting
Sum of odd‑digit numbers
Find the sum of all five‑digit numbers greater than 10000 that can be formed using each of the digits 1, 3, 5, 7, 9 at most once.
H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XI. Permutations and Combinations, Examples XI.b, No. 29
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