How many separate events make up a decathlon?
Im guessing 10 separate events. From the root word "deka" which is Greek for 10. The decathlon is a ten event competition spread over two days:
First Day: 100 meter dash, long jump, shot put, high jump, 400 meter run
Second Day: 110 meter hurdles, discus, pole vault, javelin, 1500 meter run
The Decathlon is comprised of Ten (10) events. The Pentathlon is comprised of Five (5) events. There are a combined fifteen (15) events. However, the pentathlon's five events are also encompassed within the decathlon as well. Therefore, technically there are only Ten (10) unique events between the two competitions.