Result of minimum how many matches has to change in order to make Faisal a highest scorer keeping all the rules of the tournament valid?

Bhanu

Total number of matches in the 1st stage is 4 x 7 = 28, lets consider group 1 here if seed 1 won all the matches then remaining 21 matches or points can be equally distributed to 7 player (3 points each) and the lowest possible player would advance to next stage with tie breaker rule. In this stage seed 13 can get 3 points after 2 upsets caused by him. So from this group seed 1 and 13 would advance to the next stage. Similarly from 2^nd group seed 2 and 14 would advance to the next stage.
Now as per the rule seed 1 will play with seed 14 and seed 2 will play with seed 13,
If seed 13 and 4 meet in the tournament then seed 13 will win with 3 upset.

Total number of matches is 60 and out of those more than 45 matches are upset. But seed 1 need only 9 matches to win the tournament hence seed 1 may win the tournament.

Seed 9 will play with seed, 1, 3, 5, 7, 11, 13, and 15 without an upset seed 9 can with seed 11, 13, and 15, for minimum number of upset let seed 1 won all the matches and seed 9 won against seed 3 and 5, in that case number of wins of seed 3 and 9 is 5 but with tie breaker rule seed 9 will advance to the next stage.

Number of matches in stage 1 is 2(7 x 8/2) = 56, at semifinal stage we have 3 matches (2 semifinal and 1 match for 3^rd place) and 1 final match, hence total number of matches is 56 + 3 + 1 = 60

it can be 3 and 4

Except 413, the sum of the digits of each number = 9

Option (a) having correct group because all are juicy fruits.

Only option (a) is correct because all are birds in that group.

Only option (d) is correct because all are the units, which are related to Science.