Nickels and Dimes is a fun workout you can do almost anywhere. At the top of every minute for 10 minutes you will complete 5 pull-ups (nickels) and 10 push-ups (dimes). By the end of the workout, you will have completed 50 pull-ups and 100 push-ups.
Your first set you may be able to complete the nickels and dimes within the first 20 seconds. As your workout continues, it will take longer to complete each set, thus giving you less and less of a rest period. By the 10th minute, you may not get to rest at all, and you will need to power through to complete the workout! It may sound easy, but it just 10 minutes you can get one heck of a workout.
You can modify this workout as needed. For example, you can do the workout for 15 minutes instead of 10, shorten or lengthen the rest period, or you can do pennies and nickels and complete 1 pull-up and 5 push-ups.
You can also change the exercises from pull-ups and push-ups to exercises that strengthen other muscle groups. You can do 5 tuck-jumps and 10 lunges, 5 leg raises and 10 sit-ups, or even sprint for 5 seconds and jog for 10 seconds. Each one of these will be repeated at the top of the minute.
I enjoy this exercise because at the surface it is very simple, every minute you do 5 pull-ups and 10 push-ups. But to meet your fitness goals, you can modify it to be a simple timed circuit that can be completed almost anywhere.