Question:

PSLE

The area of a square is 81 cm^{2}. What is the perimeter of the square?

1 m
The area of a square is 81 cm

Find the perimeter of the shaded parts. (Take π = 3.14)

1 m

PSLE

The square ABCD is made up of 4 smaller squares.

The square ABCD is made up of 4 smaller squares.

- What is the ratio of the area of the shaded part to the area of the unshaded part?
- If the length of the square ABCD is 4 cm, what is the area of the shaded part?

2 m

PSLE

The block of wood shown was dipped into a pail of paint. The block was then cut into 4 identical cubes along the dotted lines and taken apart. The total unpainted area of the 4 cubes was 216 cm^{2}. What was the volume of each cube?

The block of wood shown was dipped into a pail of paint. The block was then cut into 4 identical cubes along the dotted lines and taken apart. The total unpainted area of the 4 cubes was 216 cm

2 m

The figure is not drawn to scale. It is made up of a square and rectangle. The ratio of the area of the square to that of the rectangle is 1 : 3. After the grey part is cut out, the ratio of the area of unshaded part of the rectangle to that of the square is 5 : 1. Given the length of the square is 5 cm, find the area of the grey part.

2 m
The figure shows a piece of paper. When the shaded rectangles A, C, D and square B is cut out, the remaining parts form the net of a cuboid. Area E is a square. Given that the area of A is 18 cm^{2} and the area of B is 81 cm^{2}, find the volume of the cuboid.

2 m

The figure shows cardboard pieces used to form the net of a cuboid. The area of each square piece is 25 cm^{2} and the area of each rectangular piece is 40cm^{2}

2 m

A cuboid has a square face of area 49 cm^{2}. The ratio of its length to its breadth is 9 : 7. Find its volume.

2 m

This figure is not drawn to scale. It is made up of 3 squares. The ratio of the area of the smallest square to the largest square is 2 : 9 while the shaded area is ^{3}_{7} of the unshaded area. What is the ratio of the shaded area to the area of the smallest square?

2 m
The first three figures of a sequence are shown. The table records the number of shaded and unshaded rhombuses in each figure.

- Find the number of unshaded rhombuses in Figure 10?
- Find the number of shaded rhombuses in Figure 40?
- Which figure number has 804 shaded rhombuses.

2 m