PSLE
A player has to play a total of five games in Round 3 of a competition. The scores for Billy's first four games are shown. Billy will qualify for Round 4 if his average score for four of the five games is 40 or more. What is the lowest score Billy must get in the 5^th game to qualify for Round 4?

Round 3
Game	Score
1st	39
2nd	39
3rd	35
4th	30
5th	?

Lowest total score for four games to qualify
= 4 x 40
= 160

To get the lowest score in the fifth game to qualify for Round 4, we need to exclude the lowest score (30) 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 160.

Score in the 5th game
= 160 - 39 - 39 - 35
= 47

Answer(s): 47