TRY FOR FREE
Find the following values without a calculator. Round off 98765 to
  1. the nearest ten.
  2. the nearest hundred.
  3. the nearest thousand.
  4. the nearest ten thousand.
1 m
The figure is made up of 3 rectangles and 3 semi-circles. Find the perimeter of the figure. (Take π = 227) Round off the answer to the nearest whole number.
2 m
The ratio of Henry's total points to that of Vincent's in a mock test was 6 : 7. In the next mock test, Henry's points increased by 70%. By what percentage must Vincent's points be increased if their total points were to be the same? Round off the answer(s) to the nearest whole number.
3 m
The figure is formed by 2 semicircles, 2 identical quarter circles and a square ABCD. The perimeter of square ABCD is 60 cm. What is the total area of the shaded parts? Express the answer in the nearest whole number. (Take π = 3.14)
2 m
The figure shows a tank made up of 3 sections. Cuboid A with a square base of side 4 cm and height 30 cm. Cube B with a side of 12 cm. Cuboid C that is 60 cm by 20 cm by 40 cm. Water from a tap above flows down at a rate of 1.2 litres per minute while water is drained out from the bottom at a rate of 1 litre per minute. How long did it take to fill up the tank to a height of 66 cm from the base? Give the answer in minutes correct to nearest whole number.
3 m
A tank, 110 cm by 100 cm by 70 cm, was completely filled with water. It was used to fill 16 bottles, each 3 litres in capacity. What was the height of the water left in the tank after all the bottles were filled. Round off to whole number.
3 m
PSLE
Round off 25 571 to the nearest hundred.
1 m
PSLE
Round off 986 593 to the nearest ten thousands.
1 m
PSLE
There were 282 075 tourists at a theme park in 2014. Express this number to the nearest thousand.
1 m
A garden path is to be cemented at $14 per m
3 m