What is a Common numbers?

Answer 1

Single digit numbers are very common in Baseball. 3, 5, and 7 are typically taken on most professional Baseball teams. However, there are no common boaseball numbers and no specific numbers for position players today. In the early days of baseball the players simply wore the number of their position, i.e. shortstop - 6, pitcher - 1, 1st base - 3, etc. Hence the terms 6-4-3 double play and so on.

Answer 2

All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as "common factors."