Every minute on the minute do the reps of the primary exercise, then finish the minute with as many reps as possible of the secondary exercise.
Minute 1: 10 Pushups, then Mountain Climbers
Minute 2: 10 Lunges ea, then Jump Squats
Minute 3: 10 V-Ups, then Russian Twists
Minute 4: 6 Burpees, then Jumping Jacks
Minute 5: Rest.