There are 16 people in a competition. each round will be 1 vs 1. so, how many rounds in total?

There are 16 people in a competition. Each round will be 1 vs 1. So, how many rounds in total? The answer is 8 rounds

Same answer ^ eight rounds would be the answer! But to explain further I would draw sixteen lines and circle two together until no lines where left! Or count by two's until you reach sixteen and two times eight or (eight groups) equals sixteen or (sixteen people)!