Christian Watford has 10 points for Indiana, which trails Purdue 41-31 at halftime
Verdell Jones III added eight points for IU, which is shooting 38.5 percent from the floor.
E’Twaun Moore leads Purdue with 11 points. The Boilermakers have made seven three-pointers. Purdue is shooting 61.5 percent from the floor.
IU got within 28-27 when Watford made two free throws with 4:54 remaining. The Boilermakers closed the half on a 13-4 run.