Four matches are to be played in a chess tournament. In how many ways can result be decided?

Thirty two players play in a knock out tennis competition. Each player plays a first round match against one other player and the winner goes into the second round whilst the loser drops out. This process continues until there are only two players left who play a final to decide who is the champion. How many matches are played all together? 16 31 15 32

A table tennis tournament was going on with knock out terms which means the one who loses the match is out of the tournament. 100 players took part in that tournament. How many matches were played?

In the last round of a chess tournament the final match is between Alice and Diego. The winner is the first player to win three games [sometimes called “best of 5”]. Assume that they are equally matched, so that each player has an equal probability of winning each game. What is the probability that the match will be finished after the first 3 games are played?

Only seven people participated in this year's chess tournament, in which each one played one game with every other one. On Monday, Saad played 1 game, Saeed played 2, Ahmed 3,Khaled 4, Osama 5 and Ashraf played 6 games. How many games did Nawaf play on Monday? A 1 B 2 C 3 D E 4 5

In a tournament, a team has played 40 matches so far and won 30%30% of them. If they win 60%60% of the remaining matches, their overall win percentage will be 50%50%. Suppose they win 90%90% of the remaining matches, then the total number of matches won by the team in the tournament will be.