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

Round 4
Game	Score
1st	85
2nd	88
3rd	89
4th	79
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 4th 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 1st, the 2nd and the 3rd games must score a total of 360.

Score in the 5th game
= 360 - 85 - 88 - 89
= 98

Answer(s): 98