50 Lying Pull Ups (Lying under a bar, feet on the floor, pull chest to the bar)
100 Push Ups (Chest all the way to the floor, then arms fully extended)
200 Crunches (Knees bent, feet flat on the floor, Arms extended towards the sky, crunch up so your shoulder blades are off the ground)
300 Squats (Feet slightly wider than the hips, toes pointed out slightly, squat down until your bum touches a med ball, then up until legs fully extended)
The aim is to complete all of this in the fastest time with GOOD technique!!!
You can do any number of any exercise, in any order, just keep a running tally of your reps until you are finished.