Level 3
The average age of a group of teachers and lawyers is 40. If the average age of the teachers is 35 years and that of the lawyers is 50 years, what is the ratio of the number of teachers to lawyers?
Level 2 PSLE
The average height of a group of children was 139.4 cm.
When Mr Tan measured and recorded the height of these children, he wrongly recorded one child's height as 181 cm when it should have been 118 cm. As a result, Mr Tan calculated the average height as 142.4 cm. How many children were there in the group?
Level 3
Bottle A and Bottle B have a total amount of 1050 mℓ of water. For Bottle B and Bottle C, the total amount of water is 1320 mℓ. The amount of water in Bottle A is 25 the amount of water in Bottle C. What is the average amount of water in the 3 bottles?
Level 2 PSLE
The table shows the number of books read by each child in a class of 21 children. One of the numbers in the table is covered by an ink blot. The average number of books read by the children in the class is 6. What is the number covered by the ink blot?
Level 2 PSLE
The table shows the number of books read by each child in a class of 21 children. One of the numbers in the table is covered by an ink blot. The average number of books read by the children in the class is 6. What is the number covered by the ink blot?
