Question 2
A heat wave in Dallol, Ethiopia lasts three months and rapidly evaporates a reservoir. In its first peak week, half the original water is lost; the second week loses another $1/6$ of the original amount, the third $1/12$, the fourth $1/20$, the fifth $1/30$, and so on. What fraction of the original water remains after the heat wave? Take one month as four weeks.
