Level 1
3 boys and 4 girls have a total of 840 stamps. What is the average number of stamps each child has?
1 m
Level 1
Jane has 4 different pieces of string measuring 20 cm, 18 cm, 10 cm and 12 cm. What is the average length of each piece of string?
1 m
Level 1
During a donation drive, Lisa and her 4 friends collected a total of $5160 in six weeks. What was the average amount each of them collected in a week?
1 m
Level 1
The total mass of 30 children is 612 kg. What is the average mass of one child? Give the answer in 1 decimal place.
1 m
Level 1
The average mass of a tiger and a leopard is 183 kg. The tiger's mass is 7 kg more than the leopard's. Find the mass of the tiger.
1 m
Level 1
A tiger eats an average of 28 kg of meat per day, while a lion eats an average of 30.5 kg of meat per day. How much more meat than the tiger will the lion eat in a week?
1 m
Level 1
The average height of the 4 girls is 155 cm.
What is their total height?
1 m
Level 1
There are 4 girls.
The total height of the 4 girls are 620 cm.
What is the average height of the girls?
1 m
Level 1
The total height of the 4 girls is 620 cm.
The average height of the 4 girls is 155 cm.
How many girls are there?
1 m
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
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
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
Level 2
The graph shows the earnings that an apparel store made from January to May.
  1. What was the total earnings from January to May?
  2. How much money must be earned in June to have an average earnings of $3200 from January to June?
2 m
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
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
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
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
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
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
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