Henry Ernest Dudeney/Puzzles and Curious Problems/301 - Weighing the Tea

by : $301$

 * Weighing the Tea
 * A grocer proposed to put on $20$ pounds of China tea into $2$-pound packets,
 * but the weights had been misplaced by somebody, and he could only find the $5$-pound and the $9$-pound weights.
 * What is the quickest way for him to do the business?


 * We will say at once that only nine weighings are really necessary.