31 P5.ST.JC.18121205
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more,
the average cost of the books becomes $35.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
32 P5.DA.JM.17083163
Level 2
The table shows the number of points Alfie scored in playing computer games. What is the average number of points he scored?
2 m
Table Average
33 P5.ST.JC.18121206
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more and
2 of the books are now each $5 less,
the average cost of the books becomes $32.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
34 P5.DA.JM.17083167
Level 2
The average capacity of 3 containers is 35 ℓ. Given that the total capacity of two of the containers is 86 ℓ, what is the capacity of the third container?
2 m
Average Volume
35 P5.ST.JC.18121207
Level 3
The average cost of some books is $10.
After 2 new books are added,
it adds another $60 to the total cost.
As a result, the average cost of all the books increases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
36 P5.ST.JC.18121208
Level 3
The average cost of some books is $30.
After 2 new books are added,
it adds another $10 to the total cost.
As a result, the average cost of all the books decreases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
37 P5.DA.NK.23052613
Level 2
The average score of Matthew, Lily and Ellie in the English quiz is 84. Lily's score is 6 above the average score while Ellie's score is 12 below the average score. How many marks does Matthew receive for the English quiz?
2 m
Average More than or less than
38 P5.ST.JC.18121209
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
Average with min-max
39 P5.DA.JM.17083170
Level 2
Three containers contain an average of 48 ℓ of water. The 1st container contains 52 ℓ of water and the 2nd container contains 10 ℓ more water than the 1st container. How much water does the 3rd container contain?
2 m
Average Volume More than or less than
40 P5.DA.JM.17083171
Level 2
The mass of a box containing 8 durians is 28.9 kg. Given that the mass of the empty box is 1.7 kg, what is the average mass of the 8 durians?
2 m
Average D 4 operations Mass

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