PSLE
A player has to play a total of five games in Round 4 of a competition. The scores for Ian's first four games are shown. Ian will qualify for Round 5 if his average score for four of the five games is 90 or more. What is the lowest score Ian must get in the 5^th game to qualify for Round 5?

Round 4
Game	Score
1st	79
2nd	89
3rd	85
4th	87
5th	?

Lowest total score for four games to qualify
= 4 x 90
= 360

To get the lowest score in the fifth game to qualify for Round 5, we need to exclude the lowest score (79) at the 1st game in Round 4 so that the rest of the four games can be as high as possible to qualify for Round 5.

Hence, the 2nd, the 3rd, the 4th, and the 5th games must score a total of 360.

Score in the 5th game
= 360 - 89 - 85 - 87
= 99

Answer(s): 99