Jos Buttler hit England`s fastest one-day international century to lead them to an 84-run win over Pakistan in Sharjah and a 3-1 series victory.Buttler reached three figures in 46 balls, beating the 61-ball hundred he made against Sri Lanka in May 2014.The wicketkeeper hit 10 fours and eight sixes in his 116 not out from 52 balls as England posted 355-5.Pakistan briefly threatened a thrilling chase, but were bowled out for 271, with Moeen Ali taking 3-53.Buttler`s effort was the joint-seventh fastest in the history of ODI cricket and the quickest against Pakistan.He has now scored the three fastest England centuries in the 50-over game, along with a 66-ball hundred against New Zealand in June.That was Buttler`s last score of 50 or more in all international cricket, a run of poor form that saw him dropped from the Test side for the third match against Pakistan this month.The record for the fastest hundred in ODIs is the 31-ball effort of South Africa`s AB de Villiers made against West Indies in Johannesburg in January this year. -BBC