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?
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?
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?
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?
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?
Level 2
The average height of some children is 160 cm. There is an equal number of boys and girls. The average height of the boys is 170 cm. Find the average height of the girls. Give your answer in cm.
Level 2
Samantha scored a total of 98 marks for her History and Geography tests and a total of 130 marks for her Chinese and English tests. What was her average marks for the 4 subjects?
Level 2
There are 8 boys and 12 girls in a class. If each boy gets 15 sweets and each girl gets 20 sweets, what is the average number of sweets each child gets?
Level 2 PSLE
Five girls shared the cost of a gift equally. When calculating the amount for each share, one of the girls made a mistake by dividing the cost of the gift by 4 instead of 5. Each girl paid $2.40 more than her share. What should be the cost of the gift?
Level 3
William had some coins. 40% of his coins were made up of 50-cent coins which was equal to the number of $1 coins. The rest of the coins were made up of 20-cent coins. Given that William had $16 more 50-cent coins than 20-cent coins, how many coins did William have altogether?
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?
Level 2 PSLE
At a carnival, 65% of the tickets were sold at full price and 25% of the tickets at half price. The remaining 30 tickets were given away free. The total amount of money collected was $9300. What was the full price of a ticket?
Level 3
A bag consists of a number of 20-cent and 50-cent coins. There are 85% as many 20-cent coins as 50-cent coins. How much money is there in the bag if there are 30 more 50-cent coins than 20-cent coins?
Level 2 PSLE
Alex saved a total of $138 in coins in his coin box. 23 of all the coins saved were one-dollar coins. There were 3 times as many one-dollar coins as twenty-cent coins. The remaining coins were fifty-cent coins. How many coins did Alex save in his coin box altogether?
Level 3
During her shopping trip, Samantha bought three different types of pens, X, Y and Z in the ratio of 4 : 2 : 5. She decided to sell them at the prices listed as shown.
Pen X: $1.20
Pen Y: $0.85
Pen Z : $0.60
Given that Samantha bought a total 451 pens, how much did Samantha collect from the sale of all the pens?
Level 3
At the school's annual band concert, 40% of the students were from upper primary and the rest were from lower primary. The entrance fee to the concert for each upper primary student and each lower primary student was $8 and $6 respectively. The total entrance fees collected for all the tickets was $5440. How many students were at the concert?
