1973 AHSME Problems/Problem 7
Problem
The sum of all integers between 50 and 350 which end in 1 is
Solution
The numbers that we are adding are . The numbers are part of an arithmetic series with first term , last term , common difference , and terms. Using the arithmetic series formula, the sum of the terms is .
See Also
1973 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 6 |
Followed by Problem 8 | |
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