443 by srilanka
37 runs by chris gayle in IPL ( indian premier league )
The most runs that a batsman can score in one shot is six, achieved by hitting the ball over the boundary without making contact with the ground.
In the records its down as 36, however the highest score so far is 77 off an over which had 17 no balls and only 5 legitimate balls because of the umpires miscalculation This was banned from the records because the bowler deliberately let the batsmen score the runs.
one can only score 36 runs,since there are only 6 balls & one can score upto 6 runs in a single ball. but there are instance of scoring more than 36 due to extra given
the highest score in one over in t20 is 36 runs by Virat Kohli and by Shahid Afridi scored 34 runs in 1 over.........
highestly9 balls per over has been bowled in one day cricket.
Super over happens when both the teams have same score.