Level 3
Some patterns of shaded and unshaded small triangles is given. The unshaded triangles are those which have at least one side on the edge of the big triangle. All of the other small triangles are shaded. The table below shows numbers of small triangles.
  1. Find the total number of triangles in Pattern 80.
  2. Find the number of shaded triangles in Pattern 40.
  3. Find the number of unshaded triangles in Pattern 50.
3 m
Level 2
Find the missing digits.
  1. A
  2. B
2 m
Level 2
The following shoes Portia's amount of savings. How much more must Portia save if she wants to buy a bag that costs $90?
3 m
Level 2
281 adults were in the school hall. There were 36 more adults than children in the hall. How many children were there in the hall?
2 m
Level 3
A pail can hold 18 ℓ of water. 3 bottles of water can fill up half the pail. How much water can each bottle hold?
3 m