1 P5.ST.JC.18121190
Level 1
The total height of 4 girls and 5 boys is 1440 cm.
The average height of the 4 girls is 155 cm.
What is the average height of each boy?
1 m
2 averages
2 P5.ST.JC.18121191
Level 2
There are 4 girls and 5 boys.
The average height of the 4 girls is 155 cm.
The average height of 5 boys is 164 cm.
What is the average height of all the children?
2 m
2 averages
3 P5.ST.JC.18121198
Level 2
The average height of 4 girls is 100 cm.
The average height of 5 girls is 110 cm.
Find the height of the fifth girl.
2 m
2 averages
4 P5.ST.JC.18121199
Level 3
There are 4 girls and some boys.
The total height of the children is 1440 cm.
The average height of the 4 girls is 155 cm.
The average height of the boys is 164cm.
How many boys are there?
3 m
2 averages
5 P5.ST.JC.18121193
Level 2
The average cost of 5 books is $30.
After a book that costs $60 is removed,
  1. What is new total cost of all the remaining books?
  2. What is new average cost of all the remaining books?
3 m
2 averages Averaging out
6 P5.ST.JC.18121194
Level 2
The average cost of 5 books is $30.
After 2 books are removed,
the average cost of the remaining books is $20.
  1. What is the total cost of the 2 books that are removed?
  2. What is the average cost of the 2 books that are removed?
3 m
2 averages Averaging out
7 P5.ST.JC.18121195
Level 2
The average cost of 5 books is $50.
After 2 new books are added,
the average cost of all the books is $40.
  1. What is the total cost of the 2 books that are added?
  2. What is the average cost of the 2 books that are added?
3 m
2 averages Averaging out
8 P5.ST.JC.18121200
Level 2
The average cost of 4 books is $30.
The average cost of 3 books is $10.
What is the cost of 4th book?
2 m
2 averages Average with unknown quantity
9 P5.ST.JC.18121202
Level 3
The average cost of some books is $75.
When another 3 books are added,
the total cost increases by $190.
The average cost becomes $70.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
10 P5.ST.JC.18121203
Level 3
The average cost of some books is $30.
When a book that costs $90 is added,
the average cost of the books becomes $40.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
11 P5.ST.JC.18121204
Level 3
The average cost of some books is $30.
When a book that costs $90 is removed,
the average cost of the books becomes $10.
How many books are there in the end?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
12 P5.ST.JC.18121205
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more,
the average cost of the books becomes $35.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
13 P5.ST.JC.18121206
Level 3
The average cost of some books is $30.
If 3 of the books are now each $15 more and
2 of the books are now each $5 less,
the average cost of the books becomes $32.
How many books are there altogether?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
14 P5.ST.JC.18121207
Level 3
The average cost of some books is $10.
After 2 new books are added,
it adds another $60 to the total cost.
As a result, the average cost of all the books increases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
15 P5.ST.JC.18121208
Level 3
The average cost of some books is $30.
After 2 new books are added,
it adds another $10 to the total cost.
As a result, the average cost of all the books decreases to $20.
How many books are there at first?
3 m
2 averages Averaging out Average with unknown quantity Number x value Units equations Units table
16 P5.DA.NK.23012603
Level 1
The average mass of Perry, Ethan and Tom is 36 kg. The average mass of Perry and Ethan is 34 kg. Find Tom's mass.
2 m
2 averages Mass
17 P5.DA.NK.23052638
TRY FOR FREE
Level 1
The average cost of a duck and 6 turkeys is $10.20. The average cost of each turkey is $9.90. How much does the duck cost?
2 m
Attempt
2 averages Number x value Money
18 P5.DA.NK.23012619
Level 1
A family's average monthly spending for August and September was $713. Their average monthly spending from October to December was $824. What was their total spending from August to December?
2 m
2 Averages Money Duration
19 P5.DA.JM.17083143
Level 1
The average of two numbers is 124 and the average of another set of two numbers is 262. Find the average of these four numbers.
2 m
Averaging out 2 averages Number x value Units table
20 P5.DA.NK.23052622
TRY FOR FREE
Level 2
A group of 50 girls and 20 boys took part in a Mathematics test. The average score of the girls was 50 points. While the average score of the boys was 64 points. What was the average score of all the students who participated in the test?
2 m
Attempt
Averaging out 2 averages Number x value Units table

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