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The sequence $a_{1}, a_{2}, a_{3}, a_{4}, a_{5}$ is such that $a_{n} = a_{n-1} + 5$ for $2 \leq n \leq 5$. If $a_{5} = 31$, what is the value of $a_{1}$?
in GMAT Problem Solving by Platinum (112k points) | 15 views

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