MathDB
Turkey Junior Olympiad 1997, Part II - P3

Source:

January 18, 2013

Problem Statement

11 or āˆ’1-1 is written in 5050 letters. These letters are put into 5050 envelopes. If you ask, you can learn the product of numbers written into any three letters. At least, how many questions are required to find the product of all of the 5050 numbers?