61 P6.SP.TL.18012213
Level 2
A lorry and a bus were travelling from town A to town B which were 720 km apart. The bus set off 2 12 h later than the lorry but arrived 1 12 h earlier. If the average speed of the lorry was 60 km/h, find the average speed of the bus.
2 m
DST triangle Average speed Different speed Same starting point Duration
62 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
63 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
64 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
65 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
66 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
67 P5.ST.JC.18121210
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
Average with min-max
68 P5.DA.JC.17121042
Level 2
Jason joined Zumba Fitness Club three years ago when he weighed 84 kg 400 g. Given that he lost an average of 3 kg 500 g every year, how much does he weigh now? (Give the answer in kg and g.)
2 m
Average W 4 operations Mass Unit conversion
69 P6.AG.JC.17080446
Level 2
Gary weighs x kg while Jim weighs 20 kg.
  1. Find the average mass of each boy in terms of x .
  2. If x = 30, find the average mass of each boy.
2 m
Algebra in 1 variable Algebra simplifying Algebra substitution Mass Average
70 P5.DA.JM.17083165
Level 2
Mary prepared 7 jars of rose drinks for a party. Each jar contained an average of 1 ℓ 250 mℓ of rose drink. How much rose drink did she prepare altogether? Express the answer in ℓ.
2 m
Average D Multiplication Volume Unit conversion

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