Level 2
B is a number. Multiply B by 5, then add 6.23 to the product, the answer is 30.08. What number is B?
2 m
Level 2
Kevin has 6 coins in his wallet. They are either ten-cent coins or five-cent coins. What is the biggest possible amount of money in his wallet when he has one or more five-cent coins? Express your answer in dollars.
2 m
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?
3 m
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?
3 m
Level 3
The mass of a container when it is 17 full is 6.03 kg. The mass of a container when it is half full is 11.53 kg. What is the mass of the container when it is empty??
4 m