441 P5.ST.JC.18121186
Level 3
Adam and Bryan builds a toy car in 4 hours.
Bryan and Chris builds a toy car in 6 hours.
Chris and Adam builds a toy car in 3 hours.
How long does it take for Adam, Bryan and Chris to build a toy car together?
3 m
Fractions with units F 4 operations Rate more than 1 object
442 P6.ST.JC.18121450
Level 3
Fill in the blanks.
Adam has thrice as many stickers as Chris.
Adam gives 10 to Bryan.
Chris receives 10 from Bryan.
In the end, Adam has twice as many stickers as Chris.

  1. Change in the number of stickers that Chris has = _____ u
  2. Difference in the number of stickers Adam and Chris have in the end = _____ u
  3. _____ u = 10
  4. 1 u = _____
4 m
Times as many Unchanged total Units table
443 P6.DA.JC.22032405
Level 3 PSLE
The graphs show the total number of leaflets machines A and B printed from the start. Both machines started printing at the same time.
  1. How many more leaflets did B print than A in 5 minutes?
  2. Both machines did not change their rates of printing throughout. When A had printed 200 leaflets, how many leaflets had B printed?
2 m
Line graph Rate more than 1 object 24-h clock More than or less than Units method
444 P5.RA.JM.17083107
Level 2
A box contains some red, yellow and blue sweets. The ratio of the number of red sweets to the number of yellow sweets is 2 : 3. The ratio of the number of yellow sweets to the number of blue sweets is also 2 : 3. What is the ratio of the number of red sweets to the number of blue sweets in the box?
2 m
Finding ratio Repeated identity Units method
445 P5.DA.JM.17083174
Level 2
Four boys had an average score of 79 marks on the same test. Sam scored 6 points higher than Jason. How many marks did Sam score?
2 m
Average More than or less than Units method
446 P6.ST.JC.18121422
Level 3
Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 10%,
his savings decreases by 30%.

  1. Amount of spending = _____ u
  2. Amount of savings = _____ u
  3. Total amount of allowance = _____ u
  4. Difference in the amount of spending and savings = _____ u
4 m
Percent to units Percent change by Common numerator Units table
447 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
448 P6.DA.NK.21060950
Level 2 PSLE
A group of boys were asked to choose their favourite sport from swimming, basketball and football. The pie chart represents the boys choices. Half of the group chose football.
  1. What percentage of the group chose swimming?
  2. The boys' choices were also represented by a bar graph. Part of the graph had been torn off. How many boys chose basketball?
2 m
Line graph Pie chart Fraction of a set Percent of a set Units method
449 P4.ME.JM.17100359
Level 2
12 h 12 min =            s
2 m
Unit conversion Time Fractions with units
450 P5.ST.JC.18121061
Level 3
Some children board a school bus.
At Bus Stop A, 25 of them alight
and 6 children board.
At Bus Stop B, 13 of the children alight
and 4 board.
If there are 20 children on the bus now,
how many children are on the bus at first?
3 m
Fraction of a set Fraction to units Remainder concept Working backwards Units & parts
451 P6.FR.JO.21042230
Level 1 PSLE
Nina used 14 kg of flour to make muffins and 12 kg of flour to make biscuits. After that, she had 200 g of flour left. How many kilograms of flour did she have at first?
2 m
F Addition & subtraction Fractions with units Mass Unit conversion
452 P5.DA.NK.23052612
Level 2
David is 10 kg heavier than John and 8 kg heavier than Luis. The average mass of the 3 men is 77 kg. Find the average mass of John and Luis.
2 m
Average Mass More than or less than Units method
453 P4.ME.JM.17100360
Level 2
1 14 h =            s
2 m
Unit conversion Time Fractions with units
454 P5.DA.JM.17083179
Level 2
The average of two numbers is 57. If one number is twice the other number, what is the bigger number?
2 m
Average Times as many Units method
455 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
456 P6.ST.JC.18121455
Level 2
Fill in the blanks.
Adam is 10 years old and
Bryan is 2 years old.

  1. Difference in their age now = _____
  2. Difference in their age when Adam is thrice the age of Bryan = _____ u
  3. In how many years' time will Adam be thrice the age of Bryan?
  4. How old will Adam be when he will be thrice the age of Bryan?
4 m
Times as many Unchanged difference Units table
457 P5.DA.JM.17083195
Level 2
The average of two numbers is 40. If one number is thrice of the other, find the bigger number.
2 m
Average Times as many Units method
458 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
459 P5.ST.JC.18121062
Level 2
A box is 700 g when it is filled with stickers.
If 35 of the stickers are removed,
the mass of the box with the remaining stickers is 400 g.
What is the mass of the empty box?
2 m
Fraction of a set Fraction to units Repeated identity Units method
460 P6.ST.JC.18121456
Level 2
Fill in the blanks.
Adam is 50 years old and
Bryan is 40 years old.

  1. Difference in their age now = _____
  2. Difference in their age when Adam was thrice the age of Bryan = _____ u
  3. In how many years before was Adam thrice the age of Bryan?
  4. How old was Adam when he was thrice the age of Bryan?
4 m
Times as many Unchanged difference Units table

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