A sequence is formed by writing the integers the corresponding number of times as follows: 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, .... What is the 800th term in this sequence?
40
Seven consecutive integers are listed. The sum of the smallest three is 33. What is the sum of the largest three?
45
Find the sum of the first 10 terms of the arithmetic sequence 15, -7, 1, 9, ...
210
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