Level 3
Water flows into a tank at the rate of 45 ℓ per minute. After 10 min, the tap is turned off and the tank is 0.6 filled with water.
  1. How much more water is needed to fill it to the brim?
  2. The water in the tank is then poured into containers each 1.5 m long, 0.3 m wide and 10 cm high. What is the minimum number of containers needed?
4 m
Level 3
The table shows the time taken by 4 participants in a race. All the times recorded are in whole numbers. Some of the time recorded were blocked by an ink drop. The average time taken by the 4 participants was 60 seconds. The difference between the time taken by Gabriel and Owen was 2 seconds. Find the shortest possible time taken by Fred.
3 m
Level 2
Sunflowers are sold in stalks of 3 for $8. What is the maximum number of stalks of sunflowers Stella can buy if she has $82?
2 m
Level 3
A rectangular tank, measuring 30 cm by 25 cm by 40 cm, was filled with water. Ben poured all the water into 1.5 ℓ bottles. After filling 4 bottles, how many more bottles could Ben fill?
3 m
Level 3
A container measuring 25 cm by 16 cm by 48 cm was 13 filled with water at first. James poured some water into the container. In the end, the height of the water level in the container was 20 cm as shown.
  1. How much water did James pour into container? Give your answer in mℓ.
  2. James then poured all the water in the container into several identical jugs. Given that each jug can hold at least 1.25 ℓ of water, what is the least number of jugs he would need?
3 m
Level 3
A rectangular tank, measuring 20 cm by 12 cm by 15 cm, was completely filled with water. All the water was poured into identical cubical containers of side 8 cm. What was the least number of containers used?
3 m
Level 3
Five numbers were written on the whiteboard as shown:
  1. Write down the 3 numbers that will give an average of 51.
  2. After John wrote 2 -digit number on the same whiteboard, the new average of the six numbers became a multiple of 3. What was the largest possible 2-digit number written by John?
3 m
Level 3
The table shows the prices of pens sold in a school bookshop. Jessica wants to buy 26 pens. What is the least amount she will have to pay?
3 m
Level 3
A 3-digit number, when divided by 3, has a remainder of 2. When the same number, when divided by 6, has a remainder of 5. What is the smallest possible number?
3 m
Level 3
Mrs Tan wanted to invite her children to have a party at the cafe. Each lunch set costs $10.75. What is the minimum amount that Mrs Tan must pay for her 30 students?
4 m