Dundee made it back-to-back wins as they climbed off the base of the Scottish Premiership table, while Celtic eased to three more points on Saturday.
There was also late drama at Hearts with St Johnstone denied the chance to leap-frog their hosts into third spot when Callum Paterson nodded in the equaliser in a 2-2 draw.
Leaders Celtic struggled early on but eventually made light work of securing the points against Inverness thanks to second-half goals from Scott Sinclair, Leigh Griffiths and Tom Rogic in a 3-0 win.
Brendan Rodgers' men have opened up a 10-point gap, with a game in hand, on second-placed Aberdeen who won Friday night's game 2-1 at Partick Thistle.
Ross County will not have enjoyed the day's proceedings as their preparation for Sunday's visit by Rangers, live on Sky Sports 1, will have been tempered by seeing their Premiership position change to bottom spot.
But it was more jubilation for Dundee who having started the day staring up at all their Premiership rivals, hoisted themselves above County with a lively 2-0 victory over Motherwell.
Craig Wighton produced a stunning show for the hosts, but there was agony for Well, who thought they had scored when Dundee 'keeper David Mitchell collided with a post while holding Scott McDonald's over-hit cross.
Wighton set up Cammy Kerr for the opener just before the interval and Marcus Haber slotted in striker Wighton's cut-back with 10 minutes left to make the points safe.
St Johnstone made it six games unbeaten against Hearts. Tynecastle witnessed a four-goal thriller as the hosts took the lead through Prince Buaben's header, only for Danny Swanson to level before half-time.
Chris Kane came off the bench to poke in what looked like a winner on 85 minutes, but there was late relief for Hearts thanks to Patterson nodding in Don Cowie's corner to salvage a point.
Kilmarnock and Hamilton Academical could not be separated in a goalless draw. Ali Crawford missed a hatful of early opportunities for Accies, while Kris Boyd wasted two headers for the home side.