Level 3
Adam's exam scores are as follows:
80 English
68 Chinese
8? Math
7? Science
Adam scored an average of 75 marks for the 4 subjects.
What is the greatest possible score for Math?
3 m
Level 3
Adam's exam scores are as follows:
80 English
68 Chinese
7? Math
7? Science
Adam scored an average of 75 marks for the 4 subjects.
What is the smallest possible score for Math?
3 m
Level 2 PSLE
The average of three different 2-digit numbers is 21. Of the three numbers, find the largest possible number.
2 m
Level 2 PSLE
The average of four 3-digit numbers is 240. Two of the numbers are 190 and 230. What is the largest difference between the other two numbers?
2 m
Level 3 PSLE
A player has to play a total of five games in Round 1 of a competition. The scores for Barry's first four games are shown. Barry will qualify for Round 2 if his average score for four of the five games is 50 or more. What is the lowest score Barry must get in the 5the game to qualify for Round 2?
2 m
Level 3
The table shows the marks Michelle scored in her end of year examinations. Michelle scored an average of 75 marks for the 4 subjects. What is the greatest possible mark that she could have scored for Science?
2 m
Level 3
The table shows Fabian scores in 3 of the 4 games that he played.
Fabian will get a prize if his average score for three of the four games is 25 or more. What is the lowest score Fabian must score in the 4th game in order to get a prize?
2 m
TRY FOR FREE
Level 3
The table shows the marks that Andy scored in his Science, English and Chinese tests. Part of the table is covered by an ink blot. The full marks for each test was 100. The average score for his three tests was 76 marks. Find the highest possible marks that Andy scored in his Science test.
2 m
Level 3 PSLE
Table 1 consists of numbers from 1 to 72. Kenny and Lionel are given a plastic frame that covers exactly 9 squares of Table 1 with the centre square covered.
  1. Kenny puts the frame on the 9 squares shown in Figure 1. What is the average of the 8 numbers that can be seen in the frame?
  2. Lionel puts the frame on some other 9 squares. The sum of the 8 numbers that can be seen in the frame is 320. What is the smallest number that can be seen in the frame?
3 m
Level 3
Marilyn accidentally spilled ink onto her results slip. Her results were as follows:
  1. What could be the smallest possible difference between her Chinese and Mathematics results?
  2. What could be the largest possible difference between her Chinese and Mathematics results?
4 m