Sanath Jayasuriya he scored 50 in 17 balls
sanath jayasuriya made the fastest fifty
Kevin O'Brien(Ireland) vs England in 2011.he made century on 50 balls.
As of January 2011, just a single player has made over 50 centuries in Test match cricket, India's Sachin Tendulkar, who has made 51 centuries in 177 Test matches.
Charles bannerman of australia has made the first century in test match against england he has scored 165 not out in the fist match of history of test cricket.
A replacement can be made in bringing a substitute fielder in the field
Charles Bannerman made 165 (retired hurt) for Australia in the first cricket test at the Melbourne Cricket Ground, during the match between Australia and England in March 1877.
Sri Lanka & Australia
Windies' Dottin made first centure in t20 woman cricket.
Inzamam-ul-Haq (Pakistan),he made 60 runs on 37 balls