511 P4.AP.JM.17100173
Level 3
The breadth of a rectangle is 23 as long as its length. Given that the perimeter is 80 cm, find its area.
3 m
Rectangle Fraction to units Units method
512 P4.AP.JM.17100177
Level 2
The area of a rectangle is 54 cm2. Given that its breadth is 23 of its length, find its perimeter.
3 m
Rectangle Fraction to units Units method
513 P4.AN.JM.17092860
Level 3
In the figure not drawn to scale, ∠AEB = 90° and ∠AEF = 122°. Given that ∠AED is three times as large as ∠DEF, find ∠AED.
3 m
Angles at a point Model Times-as-many Units method
514 P5.DA.JM.17083191
Level 3
A list of 13 numbers has an average of 330. When two numbers are deleted from the list, the average of the remaining numbers is 313.
  1. What is the sum of 13 numbers?
  2. What is the bigger number between the two numbers that have been deleted given that the difference between the two numbers is 1?
3 m
Averaging out 2 Averages More than or less than Units method
515 P6.PC.JC.23100214
Level 2 PSLE
Carl had a collection of rulers, pens and markers. He had 85 rulers. 30% of his collection was pens. He had 51 fewer pens than markers.
  1. How many pens did Carl have?
  2. Carl gave away some pens. His total collection decreased by 20%. What percentage of his collection was pens after that?
4 m
Percent of a set Percent change by More than or less than Units method

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