Problem K. 433. (November 2014)
K. 433. We have four objects that look all alike, but weigh 3, 5, 8 and 11 kg. We also have an equal-arm balance without extra weights.
\(\displaystyle a)\) By using the balance only twice, how can we identify the 11-kg object?
\(\displaystyle b)\) With two further measurements, how can we determine the masses of the other objects, too?
(6 pont)
Deadline expired on December 10, 2014.
Statistics:
121 students sent a solution. 6 points: 85 students. 5 points: 5 students. 4 points: 1 student. 3 points: 3 students. 2 points: 17 students. 1 point: 3 students. 0 point: 5 students. Unfair, not evaluated: 2 solutionss.
Problems in Mathematics of KöMaL, November 2014