The most difficult statistics riddles A list of statistics related questions that are most often answered incorrectly Technology quiz 1. During World War II, Allies recorded the serial numbers of captured German tanks' gearboxes. Why? (average, 67%)To estimate total tanks production. The allies found out, that the gearbox numbers fell in two unbroken sequences, so large production resulted in influx of large serial numbers. Today, the problem of estimating the maximum of a discrete uniform distribution from sampling without replacement, is known - in the English-speaking world - as the German tank problem.average 67% to track the movement of tanksto track the movement of tanks7%to identify the tanks re-captured by Germansto identify the tanks re-captured by Germans19%to estimate total tanks productionto estimate total tanks production67%to take part in the "Top tank killer" contestto take part in the "Top tank killer" contest4%Created by: globalquiz.org. Statistics based on 17331 answers in 2 languages »tanks riddles » Play technology quiz and see all the questions.