21 P5.ST.JC.18121197
Level 3
The average number of stickers that Adam and Bryan have is 30.
The average number of stickers that Bryan and Chris have is 50.
The average number of stickers that Chris and Adam have is 40.
  1. How many stickers does Adam have?
  2. How many stickers does Bryan have?
  3. How many stickers does Chris have?
3 m
Average with repeated identity Units & parts & boxes
22 P5.DA.JM.17083168
Level 1 PSLE
Find the average of the numbers 8, 0 and 28.
2 m
Average
23 P5.ST.JC.18121201
Level 2
The average cost of three books is $30.
Two of the books cost $10 and $20.
What is the cost of the 3rd book?
2 m
Averaging out Average with unknown quantity Units equations
24 P5.DA.JM.17083186
Level 1
In 8 years' time, the average age of Mr Tong and his son will be 27 years. What is their total age now?
2 m
Average
25 P5.ST.JC.18121202
Level 3
The average cost of some books is $75.
When another 3 books are added,
the total cost increases by $190.
The average cost becomes $70.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
26 P5.DA.JC.17100325
Level 1
Tom is 72 kg. Alice's mass is 79 of Tom's mass. What is their average mass?
2 m
Average F Multiplication Fraction of a whole Mass
27 P5.ST.JC.18121203
Level 3
The average cost of some books is $30.
When a book that costs $90 is added,
the average cost of the books becomes $40.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
28 P5.DA.JM.17083164
Level 1
What is the average of the first 5 odd numbers?
2 m
Average Odd & even
29 P5.ST.JC.18121204
Level 3
The average cost of some books is $30.
When a book that costs $90 is removed,
the average cost of the books becomes $10.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
30 P5.DA.JM.17083185
Level 1
There are 3 boxes. The mass of Box A is 3.4 kg, the mass of Box B is 5.8 kg and the mass of Box C is 4.2 kg. Which box has its mass nearest to the average mass of the 3 boxes? Give the letter only for the answer.
2 m
Average Mass

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