401 P6.ME.JC.21031801
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Level 2
A group of 6 boys booked a badminton court for 2 hours. They took turns to play. Each boy played an equal amount of time. At any time, there were 4 boys playing on the court. How long did each boy play on the court? Express your answer in min.
2 m
Attempt
Unit conversion Duration Units method
402 P4.ST.JC.18120973
Level 2
Adam pays $2.40 for a sticker and a marble.
The sticker costs 3 times as much as the marble.
  1. What is the cost of 1 sticker?
  2. How much is the cost of 4 marbles and 2 stickers?
4 m
D 4 operations Model Times-as-many Model Stacking Units method
403 P5.ST.JC.18121206
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more and
2 of the books are now each $5 less,
the average cost of the books becomes $32.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
404 P6.ST.JC.18121406
Level 2
Fill in the blanks.
Adam has some stickers.
Bryan gives him more stickers.
The number of stickers that Adam has increases by 25%.

  1. Number of stickers that Adam has at first = _____ u
  2. Number of stickers that Bryan gives him = _____ u
  3. Number of stickers that Adam has in the end = _____ u
3 m
Percent change by Percent to units Units method
405 P4.ST.JC.18120974
Level 1
Adam saves $2.50.
Bryan saves 3 times as much money as Adam.
Chris saves $1.90 less than Bryan.
How much money does Chris save?
3 m
D 4 operations Model Comparison Model Times-as-many Units method
406 P5.ST.JC.18121207
Level 3
The average cost of some books is $10.
After 2 new books are added,
it adds another $60 to the total cost.
As a result, the average cost of all the books increases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
407 P6.ST.JC.18121407
Level 3
Fill in the blanks.
Adam and Bryan share some stickers.
When Adam gives 10 to Bryan, Bryan's share increases by 20%.

  1. Number of stickers that Bryan increases by in percentage = _____%
  2. Number of stickers that Bryan has in the end in percentage = _____ %
  3. _____% of Bryan's stickers is the same as 10.
  4. Number of stickers that Bryan has at first = _____
4 m
Percent change by Units method
408 P6.ME.JC.22050604
Level 2 PSLE
A group of 5 girls booked a tennis court for 3 hours and took turns to play. At any time, there were 4 girls playing on the court. On average, how long did each girl play on the court? Give the answer in hours and minutes.
2 m
Unit conversion Duration Units method
409 P4.ME.JM.17100309
Level 2
11 14 ℓ - 925 mℓ =            mℓ
2 m
Volume Unit conversion Fractions with units Mixed numbers F Addition & subtraction
410 P4.AP.NK.23050807
Level 2
ABCD and CEFG are squares and MFPN is a rectangle. Given that AB = 3 cm, and the length of NP is four times the length of AB, find the length of MG.
2 m
Length Square Rectangle Rectilinear figure Times as many Units method
411 P4.ST.JC.18120975
Level 2
Adam buys a sticker, a marble and a bead for $7.50.
The sticker costs $3.50 more than the marble.
The bead costs 3 times as much as the marble.
How much is 4 marbles and 3 stickers?
4 m
D 4 operations Model Comparison Model Times-as-many Model Stacking Units method
412 P5.ST.JC.18121208
Level 3
The average cost of some books is $30.
After 2 new books are added,
it adds another $10 to the total cost.
As a result, the average cost of all the books decreases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
413 P6.ST.JC.18121409
Level 3
Fill in the blanks.
Adam and Bryan share some stickers.
When Adam gives 10 to Bryan, Adam's share decreases by 20%.

  1. Number of stickers that Adam decreases by in percentage = _____%
  2. Number of stickers that Adam has in the end in percentage = _____ %
  3. _____% of Adam's stickers is the same as 10.
  4. Number of stickers that Adam has at first = _____
4 m
Percent change by Units method
414 P6.RA.NK.21060204
Level 1 PSLE
Sandy had 50 stickers and Tina had 22 stickers. After Sandy gave some of her stickers to Tina, the number of stickers Sandy and Tina had was in the ratio 1 : 2. How many stickers did Tina have in the end?
2 m
Ratio to units Internal transfer Unchanged total Units table
415 P6.RA.JC.17050711
Level 2
The ratio of Wendy's stamps to Yoko's stamps at first was 3 : 4. After Wendy gave Yoko 24 stamps, the ratio of Wendy's stamps to Yoko's stamps is 1 : 2. What was the total number of stamps they had altogether?
2 m
Ratio to units Internal transfer Unchanged total Units table
416 P4.ME.JM.17100310
Level 2
11 14 ℓ - 5 34 ℓ =            mℓ
2 m
Volume Unit conversion Fractions with units Mixed numbers F Addition & subtraction
417 P6.ST.JC.18121410
Level 3
Fill in the blanks.
Adam has some stickers.
Adam gives some stickers away.
The number of stickers decreases by 25%.

  1. Number of stickers that Adam has at first = _____ u
  2. Number of stickers that Adam gives away = _____ u
  3. Number of stickers that Adam has in the end = _____ u
3 m
Percent to units Percent change by Units method
418 P5.FR.JM.17083064
Level 2
John spent $90 on a webcam. This was 56 of his savings. How much savings had he left?
2 m
Fraction of a whole Money Units method
419 P6.RA.TL.16010103
Level 2
The ratio of Tim's money to Carl's money is 3 : 5. If Carl has $845, how much must he give to Tim so both will have the equal amount of money?
2 m
Ratio to units Money Equal stage after Internal transfer Unchanged total Units table
420 P6.FR.JC.17053009
Level 3 PSLE
Lynn had a bottle of oil. She used an equal amount of oil each day. At the end of the 12th day, 13 of the bottle was left. At the end of the 14th day, the amount of oil left was 100 mℓ .  What was the amount of oil in the bottle at first? Express the answer in mℓ .
2 m
Fraction of a whole F Addition & subtraction Volume Units method

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