PSLE
A player has to play a total of five games in Round 3 of a competition. The scores for Elijah's first four games are shown. Elijah will qualify for Round 4 if his average score for four of the five games is 80 or more. What is the lowest score Elijah must get in the 5^th game to qualify for Round 4?

Round 3
Game	Score
1st	79
2nd	78
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 4, we need to exclude the lowest score (68) at the 4th game in Round 3 so that the rest of the four games can be as high as possible to qualify for Round 4.

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

Score in the 5th game
= 320 - 79 - 78 - 77
= 86

Answer(s): 86