31 P6.SP.TL.18012203
Level 2
A train of length 100 m passes a bridge that is 5.5 km long. It is travelling at an average speed of 80 km/h. How long does it take the train to completely pass through the bridge? Express the answer as decimals in h.
2 m
DST triangle Average speed Unit conversion Duration
32 P5.ST.JC.18121195
Level 2
The average cost of 5 books is $50.
After 2 new books are added,
the average cost of all the books is $40.
  1. What is the total cost of the 2 books that are added?
  2. What is the average cost of the 2 books that are added?
3 m
2 averages Averaging out
33 P6.AG.JC.17080423
Level 2
The average age of Randy and Michael is 8z years. Ron is 20z years old. What is the average age of the 3 men?
2 m
Algebra in 1 variable Algebra simplifying Average
34 P5.ST.JC.18121200
Level 2
The average cost of 4 books is $30.
The average cost of 3 books is $10.
What is the cost of 4th book?
2 m
2 averages Average with unknown quantity
35 P6.SP.JC.23030121
Level 2 PSLE
Bryan cycles at a constant speed from home to work. The graph shows the distance Bryan cycles for the first 15 minutes.
The distance between Bryan's home and work is 7.5 km.
  1. How many minutes does Bryan take to cycle from home to work?
  2. What is Bryan's cycling speed in km/h?
2 m
Line graph DST triangle Average speed Duration Unit conversion
36 P5.ST.JC.18121196
Level 3
The average number of stickers that Adam and Bryan have is 30.
The average number of stickers that Adam and Chris have is 40.
The number of stickers that Bryan has is 23 as many as Chris.
  1. How many stickers does Adam have?
  2. How many stickers does Bryan have?
  3. How many stickers does Chris have?
3 m
Fraction to units Average with repeated identity Units & parts & boxes
37 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
38 P5.DA.JM.17083168
Level 1 PSLE
Find the average of the numbers 8, 0 and 28.
2 m
Average
39 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
40 P6.SP.TL.18012204
Level 2
A subway train travelled 900 km from Station A to Station B at an average speed of 150 km/h. It then moved on to Station C which is 500 km away at an average speed of 120 km/h. Find the time taken for the whole journey. Express the answer as a mixed fraction in h.
2 m
DST triangle Average speed Journey by parts Different speed Duration

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