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K. 219. Five different positive integers were chosen and pairwise multiplied together. The results are as follows: 6, 10, 15, 24, 36, 42, 60, 105, 63, 252. What were the five numbers?

(6 points)

This problem is for grade 9 students only.

Deadline expired on 10 November 2009.

Google Translation (Sorry, the solution is published in Hungarian only.)

Megoldás. A keresett számötös: $\displaystyle 2, \ 3,\ 5,\ 12,\ 21$.

Statistics on problem K. 219.
 277 students sent a solution. 6 points: 85 students. 5 points: 30 students. 4 points: 36 students. 3 points: 20 students. 2 points: 43 students. 1 point: 41 students. 0 point: 7 students. Unfair, not evaluated: 15 solutions.

• Problems in Mathematics of KöMaL, October 2009

•  Támogatóink: Morgan Stanley