PSLE
A player has to play a total of five games in Round 2 of a competition. The scores for Liam's first four games are shown. Liam will qualify for Round 3 if his average score for four of the five games is 80 or more. What is the lowest score Liam must get in the 5^th game to qualify for Round 3?

Round 2
Game	Score
1st	75
2nd	79
3rd	77
4th	68
5th	?

Lowest total score for four games to qualify
= 4 x 80
= 320

To get the lowest score in the fifth game to qualify for Round 3, we need to exclude the lowest score (68) at the 4th game in Round 2 so that the rest of the four games can be as high as possible to qualify for Round 3.

Hence, the 1st, the 2nd and the 3rd games must score a total of 320.

Score in the 5th game
= 320 - 75 - 79 - 77
= 89

Answer(s): 89