Collin Klein threw for 230 yards and accounted for three touchdowns, Tyler Lockett returned a kickoff 96 yards for another score and No. 15 Kansas State eased past pesky North Texas 35-21 on Saturday night.
   
Tramaine Thompson caught five passes for 102 yards and two scores, and John Hubert added a touchdown on the ground for Kansas State (3-0), which struggled to put away the tougher-than-expected Mean Green in its tuneup for next Saturday's showdown with fifth-ranked Oklahoma.
   
North Texas (1-2) scratched and clawed its way within 14-13 late in the third quarter before Klein and Thompson hooked up for their second touchdown.
   
Hubert and Klein added fourth-quarter scoring runs to finally give Kansas State breathing room.