41 P4.AP.JM.17100240
Level 3
The area of a rectangle is 72 cm2. Given that its length is twice its breadth, find its perimeter.
3 m
Rectangle Model Times-as-many Units method
42 P4.WN.JM.17102314
Level 2
Ken has some marbles. He has twice as many marbles as his brother. Given that they have 816 marbles altogether, how many marbles does his brother have?
2 m
Model Times-as-many Units method
43 P4.AN.NK.23041231
Level 3
The figure is made up of a square ABCD and a rectangle DEFG. ∠CDG = 69°. ∠x is twice of ∠y. Find ∠x.
3 m
Right angle Square Rectangle Overlapping angles Model Times-as-many Units method
44 P4.WN.JM.17102315
Level 2
Machine A produces thrice as many buns as Machine B in a day. Together, they produce 9408 buns in a day. How many buns can Machine B produce in a day?
2 m
Model Times-as-many Units method
45 P4.WN.JM.17102316
Level 2
In a school, there are 540 boys. There are thrice as many boys as girls. What is the enrolment of the school?
2 m
Model Times-as-many Units method
46 P4.AN.JM.17092845
Level 3
The figure shows a piece of rectangular paper ABCD folded at one of its corners A. ∠AEB is 4 times as large as ∠AEF. Find ∠AEB.
3 m
Rectangle Angles on a straight line Overlapping angles Folded figure Model Times-as-many Units method
47 P4.AP.JM.17100178
Level 3
The figure is made up of rectangle RSTU and squares PQYX and WYUV. The length of PQ is equal to the length of RS. The length of PX is twice the length of UV. Find the length of QR.
3 m
Length Square Rectangle Rectilinear figure Composite figure perimeter Equal stage Model Times-as-many Units method
48 P4.WN.JM.17102327
Level 3
There are four times as many red shirts as pink shirts in a sale. If there are 600 red and pink shirts altogether,
  1. how many red shirts are there?
  2. how many more red shirts than pink shirts?
3 m
W 4 operations Model Times-as-many Units method
49 P4.DE.JM.171010126
Level 3
Box A is 4 times as heavy as Box B. Box C is 6.74 kg heavier than Box B. The total mass of Box A and B is 68 kg.
  1. What is the mass of Box B?
  2. What is the mass of Box C?
4 m
D Addition & subtraction Mass Model Comparison Model Times-as-many Units method
50 P4.DE.JC.17100402
Level 3
Yoshi prepared some fruit punch for his party. For the fruit punch, he put in 1.23 ℓ of syrup and 4 times as much water as syrup. He then poured the fruit punch equally into 8 glasses. How much fruit punch were there in each glass? Round off your answer to 2 decimal places.
4 m
D Multiplication D Division D Round off Volume Model Times-as-many
51 P4.AN.JM.17092853
Level 3
The figure shows a square JKLM. ∠LJN is twice as large as angle MJN.
  1. Name the line of symmetry tor the square JKLM.
  2. Find ∠LJN.
  3. Find ∠JNM.
4 m
Square Angles sum of triangle Symmetry Model Times-as-many Units method
52 P4.DE.JM.17101089
Level 3
Jane mixes 2.4 ℓ of rose syrup with twice as much milk. She then pours the mixture equally into 9 cups. How much mixture will each cup contain?
4 m
D Multiplication D Division Volume Model Part-whole Model Times-as-many Units method
53 P4.WN.JM.17102230
Level 2
Mrs Lin's age is the fourth multiple of 9. Mrs Lin's age is 3 times her daughter's age. How old is her daughter?
3 m
Multiples Model Times-as-many
54 P4.DE.JM.171010108
Level 2
Gopal went to a shop with 3 fifty-dollar notes. He bought a watch and a calculator. A watch cost 3 times as much as a calculator. He received $32.40 change. How much did the calculator cost?
4 m
D 4 operations Money Model Times-as-many Units method
55 P4.DE.JM.171010127
Level 3
Tank A has thrice as much water as Tank B. If Gilbert adds 0.5 ℓ of water to Tank A and 1.8 ℓ of water to Tank B, both tanks will have the same volume of water. Find the volume of water in Tank A at first.
4 m
D 4 operations Volume Equal stage after Volume Model Times-as-many Units equations Units table
56 P4.AN.JM.17092872
Level 3
The figure shows a piece of square paper ABCD folded at two of its corners A and C. ∠AED is 3 times as large as ∠ADE and ∠CDF is 6° smaller than ∠ADE. Find ∠ADC.
4 m
Square Angles sum of triangle Overlapping angles Model Comparison Model Times-as-many Units method
57 P4.WN.JM.17102337
Level 3
There is a 4-digit number. The digit in the hundreds place is thrice the digit in the ones place. The digit in the thousands place is the smallest even number. The sum of all the digits is 21. What is the number?
3 m
W Place values Odd & even W Addition & subtraction Min-max Model Times-as-many Units method
58 P4.AP.JM.17100231
Level 3
The figure shows 4 identical rectangles (not drawn to scale). The length of each rectangle is twice its breadth. Given that the breadth of each rectangle is 4 cm, find the perimeter of the figure.
3 m
Rectangle Tiling Rectilinear figure Composite figure perimeter Model Times-as-many Units method
59 P4.FR.JC.17092826
Level 3
A barrel can hold 96 ℓ of water. A tank can hold 12 more litres of water than the barrel. An aquarium can hold 3 times as much water as the tank. If the aquarium is 34 filled with water, how much more water is needed to fill the aquarium completely?
4 m
Fraction of a whole F Multiplication W 4 operations Volume Model Comparison Model Times-as-many
60 P4.DE.NK.23011017
Level 3
The total mass of a kitten, a mouse and a puppy is 11 kg. The mouse is 0.4 kg heavier than the kitten. The puppy is 4 times as heavy as the mouse. Find the mass of the puppy.
4 m
D 4 operations Mass Times as many Model Comparison Model Times-as-many Units method

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