MathDB
2000 HMMT RMT Team #3

Source:

March 8, 2024
algebra

Problem Statement

Find the sum of all integers from 11 to 10001000 inclusive which contain at least one 77 in their digits, i.e. find 7+17+...+979+987+997.7 + 17 +... + 979 + 987 + 997.
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