 PSLE
The area of a square is 81 cm2. What is the perimeter of the square?
1 m
Find the perimeter of the shaded parts. (Take π = 3.14) 1 m
PSLE
The square ABCD is made up of 4 smaller squares.
1. What is the ratio of the area of the shaded part to the area of the unshaded part?
2. 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 cm2. What was the volume of each cube? 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 cm2 and the area of B is 81 cm2, 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 cm2 and the area of each rectangular piece is 40cm2 2 m
A cuboid has a square face of area 49 cm2. 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 37 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.
1. Find the number of unshaded rhombuses in Figure 10?
2. Find the number of shaded rhombuses in Figure 40?
3. Which figure number has 804 shaded rhombuses. 2 m