Based solely on the winning numbers from the PCSO lotto in 2020, we cannot determine the most common or high probability 6 numbers to stake on. In any lottery game, each number has an equal chance of being drawn, and past winning numbers do not guarantee future results. However, there are certain strategies that some players use to increase their chances of winning, such as choosing a mix of even and odd numbers, selecting numbers that have not been drawn in a while, or using a combination of hot and cold numbers. Ultimately, the key to winning the lottery is luck, and there is no guaranteed way to predict which numbers will be drawn.