In this post we will resolve the OBMEP 2018 questions with comments. Question 1 A crazy machine turns two fruits into one fruit, as follows: Turns two apples into an orange; Turns two oranges into one orange; Turns an apple and an orange into an apple. Q1 Item a a) How many times should the machine be used to turn three apples into one apple? Data: Initially we have 3 apples.
In this post we will resolve the OBMEP 2019 questions with comments. Question 1 Marcelo throws five rings onto a wooden peg, one at a time. When the ring hits the pin, he earns points, as shown in the table below. When the ring doesn’t hit the pin, he doesn’t get any points. The figure shows five throws made by Marcelo, in which only the blue and green rings hit the pin. Note that the green ring was the last one thrown, as it was on top of the others