Tuesday, November 9, 2010
21st All Russian Mathematical Olympiad Problems 1995
1. A goods train left Moscow at x hrs y mins and arrived in Saratov at y hrs z mins. The journey took z hrs x mins. Find all possible values of x. 2. The chord CD of a circle center O is perpendicular to the diameter AB. The chord AE goes through the midpoint of the radius OC. Prove that the chord DE goes through the midpoint of the chord BC. 3. f(x), g(x),
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