Question 16
Consider the non-decreasing sequence of positive integers $$
\begin{aligned} &1,2,2,3,3,3,4,4,4,4,\\ &5,5,5,5,5,\ldots \end{aligned}
$$ in which the $n$th positive integer appears $n$ times. The remainder when the $1993$rd term is divided by $5$ is
\begin{aligned} &1,2,2,3,3,3,4,4,4,4,\\ &5,5,5,5,5,\ldots \end{aligned}
$$ in which the $n$th positive integer appears $n$ times. The remainder when the $1993$rd term is divided by $5$ is