56 P6.DA.NK.22040501
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?
2 m
Averaging out Finding ratio
57 P6.DA.NK.21060938
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?
2 m
Average with unknown quantity Length Gap & difference
58 P6.DA.NK.21060939
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?
2 m
Average with unknown quantity Number x value Units table
59 P6.DA.NK.21060940
Level 2 PSLE
The average of three different 2-digit numbers is 21. Of the three numbers, find the largest possible number.
2 m
Average with min-max
60 P6.DA.NK.21060941
Level 2 PSLE
The average of four 3-digit numbers is 240. Two of the numbers are 190 and 230. What is the largest difference between the other two numbers?
2 m
Average with min-max

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