71 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
72 P5.ST.JC.18121192
Level 2
The average cost of 5 books is $30.
After another book that costs $90 is added,
  1. What is new total cost of all the books?
  2. What is new average cost of all the books?
3 m
Averaging out
73 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
74 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
75 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
76 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
77 P5.ST.JC.18121196
Level 3
The average number of stickers that Adam and Bryan have is 30.
The average number of stickers that Adam and Chris have is 40.
The number of stickers that Bryan has is 23 as many as Chris.
  1. How many stickers does Adam have?
  2. How many stickers does Bryan have?
  3. How many stickers does Chris have?
3 m
Fraction to units Average with repeated identity Units & parts & boxes
78 P5.ST.JC.18121197
Level 3
The average number of stickers that Adam and Bryan have is 30.
The average number of stickers that Bryan and Chris have is 50.
The average number of stickers that Chris and Adam have is 40.
  1. How many stickers does Adam have?
  2. How many stickers does Bryan have?
  3. How many stickers does Chris have?
3 m
Average with repeated identity Units & parts & boxes
79 P5.ST.JC.18121201
Level 2
The average cost of three books is $30.
Two of the books cost $10 and $20.
What is the cost of the 3rd book?
2 m
Averaging out Average with unknown quantity Units equations
80 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

5 per page

10 per page

20 per page

Symbols

STUDENT
Navigations
Contact Us
Members
Links