21 P6.ST.JC.18121421
Level 3
Fill in the blanks.
Number of boys at first is 40% of the children.
Number of boys is then decreased to 30%.

  1. Number of boys at first = _____ u
  2. Number of boys in the end = _____ u
  3. Decrease in the number of boys = _____ u
  4. Number of children in the end = _____ u
4 m
Percent to units Percent change to Unchanged quantity Units table
22 P6.RA.JC.17050710
Level 2
Sofie and Thora shared a sum of money in the ratio 2 : 5. After Sofie spent $45, the ratio became 1 : 3. How much money did Thora have?
2 m
Ratio to units Unchanged quantity Units table
23 P6.RA.NK.21060203
Level 1 PSLE
The ratio of the number of vests to that of skirts in a shopping centre was 3 : 2 at first. After 30 skirts were sold, the ratio of the number of vests to that of skirts became 4 : 1. What was the total number of vests and skirts in the shopping centre at first?
2 m
Ratio to units Unchanged quantity Units table
24 P3.ST.JC.18120897
Level 3
Adam has 6 times as much money as Bryan.
After Adam has spent $60,
he has 3 times as much money as Bryan.
  1. How much money does Bryan have?
  2. How much money does Adam have in the end?
  3. How much money do they have at first?
  4. How much do they have in the end?
4 m
Times as many Unchanged quantity Model Comparison Units table
25 P3.ST.JC.18120898
Level 3
Adam has 2 times as many stickers as Bryan.
After Adam buys another 60 stickers,
he has thrice as many stickers as Bryan.
  1. How many stickers does Bryan have?
  2. How many stickers does Adam have in the end?
  3. How many stickers do they have at first?
  4. How many stickers do they have in the end?
4 m
Times as many Unchanged quantity Model Comparison Units table
26 P3.ST.JC.18120899
Level 3
Adam has 3 times as many stickers as Bryan.
After Bryan buys another 60 stickers,
he has 2 times as many as Adam.
  1. How many stickers does Bryan have in the end?
  2. How many stickers does Adam have?
  3. How many stickers do they have at first?
  4. How many stickers do they have in the end?
4 m
Times as many Unchanged quantity Model Comparison Units table
27 P3.ST.JC.18120900
Level 3
Adam has 2 times as many stickers as Bryan.
After Adam gives away 60 stickers,
Bryan has 3 times as many stickers as Adam.
  1. How many stickers does Bryan have?
  2. How many stickers does Adam have at first?
  3. How many stickers do they have at first?
  4. How many stickers do they have in the end?
4 m
Times as many Unchanged quantity Model Comparison Units table
28 P3.ST.JC.18120901
Level 3
Adam has 3 times as many stickers as Bryan.
After Bryan gives away 60 stickers,
Adam has 6 times as many as Bryan.
  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 Unchanged quantity Model Comparison Units table
29 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
30 P3.ST.JC.18120903
Level 3
Adam has 50 stickers more than Bryan.
After Adam gives away 10 stickers,
he has 3 times as many stickers as Bryan.
  1. How many stickers does Bryan have?
  2. How many stickers does Adam have in the end?
  3. How many stickers do they have altogether at first?
  4. How many stickers do they have altogether in the end?
4 m
More than or less than Times as many Unchanged quantity Model Comparison Units equations Units table

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