Discussion
The sum of 6 consecutive integers is 9. What is the lowest integer?
Answer: D
The lowest integer is -1.
Let the integers be \(n, n+1, \dots, n+5\).
\[ \begin{aligned} 6n + 15 &= 9 \\ n &= -1 \end{aligned} \]
The integers are -1, 0, 1, 2, 3 and 4, whose sum is 9. Starting at 0 gives 15, at 1 gives 21, and at -2 gives 3.
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