A worker in a sugar factory packs 24 cardboard boxes with 15 bags of sugar in each. If he had boxes which held 18 bags of sugar each, how many fewer boxes would be needed?

Chairs in a hall are arranged in 35 rows of 18. a) How many rows would there be with 21 chairs to a row? b) How many chairs would there be in each row if there were 15 rows?

The probability of getting a bad egg in a batch of 400 is 0.035. How many bad eggs are there likely to be in a batch?

Six people can dig a trench in 8 hours. a) How long would it take: i) 4 people, ii) 12 people, iii) 1 person? b) How many people would it take to dig the trench in: i) 3 hours, ii) 16 hours, iii) 1 hour?

Chairs in a hall are arranged in 35 rows of 18.

a How many rows would there be with 21 chairs to a row?

b How many chairs would there be in each row if there were 15 rows?

The table below represents the relationship between the speed and the time taken for a train to travel between two stations.

$$\begin{matrix} \text{Speed (km/h)} & \text{60} & \text{ } & \text{ } & \text{120} & \text{90} & \text{50} & \text{10}\\ \text{Time (h)} & \text{2} & \text{3} & \text{4} & \text{ } & \text{ } & \text{ } & \text{ }\\ \end{matrix}$$

Copy and complete the table.

A millionaire leaves 1.4 million dollars in his will to be shared between his three children in the ratio of their ages. If they are 24, 28 and 32 years old, calculate to the nearest dollar the amount they will each receive.

A teacher shares sweets among 8 students so that they get 6 each. How many sweets would they each have got had there been 12 students?

A small company makes a profit of $8000. This is divided between the directors in the ratio of their initial investments. If Alex put$20000 into the firm, Maria $35000 and Ahmet$25000, calculate the amount of the profit they will each receive.

The table below represents the relationship between the speed and the time taken for a train to travel between two stations.

Copy and complete the table.

Six people can dig a trench in 8 hours.

a How long would it take:

i 4 people $\quad\quad$ii 12 people$\quad\quad$ iii 1 person?

b How many people would it take to dig the trench in:

i 3 hours$\quad\quad$ ii 16 hours$\quad\quad$ iii 1 hour?

55% of students in a school are boys. a) What is the ratio of boys to girls? b) How many boys and how many girls are there if the school has 800 students?

$\frac{7}{8}$ of a can of drink is water, the rest is syrup. What is the ratio of water to syrup?

Emerson can dig 2 holes in 3 hours and Johnna can dig 3 holes in 2 hours. Six holes need to be dug. If Emerson digs for 1 hour and then is joined by Johnna, how long will they work together to finish digging the 6 holes?