Level 3
If you round me off to the nearest thousand, you will get 7000. If you round me off to the nearest hundred, you will get 7100. The sum of all my digits is 16. What is my largest possible value?
4 m
Level 3
The figure is made up of a right-angled triangle ABC and two semicircles with AB and BC as their diameters respectively. The two semicircles and the line AC meet at D as shown. AB = 12 cm. BC = 16 cm and AC = 20 cm. (Take π = 3.14)
  1. Find the perimeter of the shaded region. Correct the answer to 2 decimal places.
  2. Find the area of the shaded region.
5 m
Level 2
Both number X and number Y when rounded off to the nearest hundred are 1200 and 5500 respectively. What is the smallest possible total for X and Y?
4 m
Level 2
Jill thought of a number. When this number is rounded off to the nearest ten, it becomes 60. This number is also a common multiple of 4 and 8. What is the smallest possible number?
4 m
Level 2
Jessie wants 200 ribbons of length 110 cm each for a party. However, the ribbons were sold at 25 m per tape. How many tapes will Jessie need?
2 m