Questions

From Worst to Best

131 P5.ST.JC.18121052

Level 3
A coin bank contains some twenty-cent and fifty-cent coins in the ratio of 2 : 5.
When 10 fifty-cent coins are taken out and
exchanged with some twenty-cent coins of the same value,
the ratio became 8 : 9.
Find the sum of money in the coin box in dollars.

3 m

Attempt

132 P6.DA.JC.23100110

Level 2 PSLE
The bar graphs show the sale of child tickets and adult tickets to a funfair over four days. The scale of the graph for adult tickets is not shown.

How many child tickets were sold in total on Tuesday and Thursday?
The ratio of the number of adult tickets sold on Monday to the total number of tickets sold on that day was 4 : 5. How many adult tickets were sold on Thursday?

3 m

Attempt

Bar Graph Ratio to units Units & parts

133 P6.AP.TL.17090761

Level 2
The figure, not drawn to scale, is made up of 3 circles. The ratio of the area of the smallest circle to the largest circle is 2 : 5 while the shaded area is ³₇ of the unshaded area. What is the ratio of the shaded area to the area of the smallest circle?

2 m

Video Attempt

Circle Overlapping area Fraction to units Ratio to units Unchanged total Units table

134 P5.VO.NK.23012637

Level 3
A cuboid has a volume of 300 cm³. Its base is a rectangle which has a perimeter of 32 cm. The ratio of the length to the breadth of the rectangle is 5 : 3. Find its height.

3 m

Attempt

Volume of cuboid Base area x height Area Perimeter Ratio to units Units method

135 P5.RD.NK.22122306

Level 3
Two identical pails C and D contained some water. Pail C was ¹₄ filled and Pail D was 1/5 filled. The ratio of the total mass of Pail C and the water in it to the total mass of Pail D and the water in it was 8 : 7. The total mass of the two pails and the water they contained was 3150 g. What is the mass of an empty pail?

4 m

Attempt

F Addition & subtraction Fraction to units Ratio to units Repeated identity Units method

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