This superstition is sometimes asserted to have originated among soldiers in the trenches of the First World War when a sniper might see the first light, take aim on the second and fire on the third.The phrase "Third times the charm" refers to the superstition that after two failures in any endeavor, a third attempt is more likely to succeed. This is also sometimes seen in reverse, as in "third man [to do something, presumably forbidden] gets caught".Luck, especially bad luck, is often said to "come in threes". Sports
In American and Canadian football, a field goal is worth three points. In association football:
For purposes of league standings, since the mid-1990s almost all leagues have awarded three points for a win. A team that wins three trophies in a season is said to have won a treble. A player who scores three goals in a match is said to have scored a hat-trick. In baseball:
A batter strikes out upon the third strike in any single batting appearance. Each teams half of an inning ends once the defense has recorded three outs (unless the home team has a walk-off hit in the ninth inning or any extra inning). In scorekeeping, "3" denotes the first baseman. In basketball:
Three points are awarded for a basket made from behind a designated arc on the floor. The "3 position" is the small forward. In bowling, three strikes bowled consecutively is known as a "turkey".
In dimensions 
  
    
      
        n
      
    
    {\displaystyle n}
   ⩾ 9, the only three uniform polytope families, aside from the numerous infinite proprismatic families, are the 
  
    
      
        
          
            A
          
          
            n
          
        
      
    
    {\displaystyle \mathrm {A} _{n}}
   simplex, 
  
    
      
        
          
            B
          
          
            n
          
        
      
    
    {\displaystyle \mathrm {B} _{n}}
   cubic, and 
  
    
      
        
          
            D
          
          
            n
          
        
      
    
    {\displaystyle \mathrm {D} _{n}}
   demihypercubic families.