Here's the rest of the answers:
1.) Not including Barry Bonds, or any current or recently retired players who are not yet eligible, every player who has ever led the league in on base percentage 3 or more seasons in a row is in the Hall of Fame, except 1. Elbie Fletcher, 1940-42
2.) In the years 1914-15, the brief presence of the Federal League meant there were 24 MLB teams in 3 leagues. Which player had the highest single-season slugging percentage during that period? As a hint, it was not any of the following: Cobb, Speaker, Jackson, or Cravath. Steve Evans, 1914
3.) In the AL's first 19 seasons, the batting title was won by either Cobb or Lajoie 16 times. Who won the other 3? One is easy...the other 2, not so much. Tris Speaker, 1916. Elmer Flick, 1905 (.308...the lowest average ever to lead the league) and the immortal George Stone in 1906 (.358).
4.) From 1901-49, only 3 players won consecutive batting titles in the NL. Two are easy: Wagner and Hornsby. Who is the 3rd? (Hint: It's not Musial...though Stan would win 3 straight from 1950-52.) Jake Daubert, 1913-14.
5.) Tough one...who was the last player to hit 25 or more triples in a single season? It's been a long time.... Kiki Cuyler, 26 in 1925
6.) First player in the NL to hit 40 or more home runs in consecutive seasons? Chuck Klein, 1929-30
7.) The list of players who led their league in RBI 3 seasons in a row is surprisingly short. Here are three of them: Cobb 1907-09, Ruth 1919-21, Hornsby 1920-22. Three other players have done it...can you name them? Cecil Fielder, 1990-92, and George Foster, 1976-78. Joe Medwick, 1936-38