46 P6.RA.JC.23030110
Level 3
The number of boys and girls in a hall were in the ratio 2 : 7. After 15 boys entered the hall and half the number of girls left the hall, the ratio of the number of boys to girls became 1 : 1. How many children were there in the hall at first?
2 m
Ratio to units Equal stage after All change Decimal units Units table
47 P4.ST.JC.18121005
Level 3
Adam pays $12 for 4 stickers and 3 marbles.
6 stickers cost as much as 3 marbles.
  1. How much is 1 sticker?
  2. How much is 1 marble?
  3. How much is 2 marbles and 3 stickers?
4 m
Equal stage Units method
48 P6.DA.NK.21060927
Level 2 PSLE
Mr Chen bought some goldfish at $10 each. He also bought an equal number of swordfish at a different price. The average price of the goldfish and the swordfish was $8. Mr Chen paid $36 more for the goldfish than the swordfish he bought. How many goldfish did he buy?
2 m
Average Money Sets More than or less than Equal stage
49 P4.ST.JC.18121006
Level 3
Adam pays $26 for 4 stickers and 3 marbles.
2 stickers cost as much as 5 marbles.
  1. How much is 1 sticker?
  2. How much is 1 marble?
  3. How much is 2 marbles and 3 stickers?
4 m
Equal stage Units method
50 P3.ST.JC.18120902
Level 3
Adam has 3 times as many stickers as Bryan.
After Bryan receives another 60 stickers,
both have equal number of stickers.
  1. How many stickers does Bryan have in the end?
  2. How many stickers does Adam have?
  3. How many stickers do they have altogether at first?
  4. How many stickers do they have altogether in the end?
4 m
Times as many Equal stage after Unchanged quantity Model Comparison Units table

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