A spinner is divided into four sectors: 120° (red), 90° (blue), 90° (green) and 60° (yellow).

What is the probability of landing on blue or yellow?

A car travels 150 km in 2 hours 30 minutes.

What is its average speed in km/h?

2 pens and 1 ruler cost $8.

1 pen and 3 rulers cost $9.

What is the cost of one pen?

A rectangle is 12 cm long and 8 cm wide.

A square has the same perimeter as the rectangle.

What is the area of the square?

A jacket costs $80. In a sale, its price is reduced by 25%.

What is the sale price?

Using each of the digits 1, 2, 3, 4 exactly once (and no digit repeated), how many different two-digit even numbers can be formed?

The table shows the goals a team scored in four games.

What is the mean number of goals per game?

It takes 4 workers 6 days to build a wall.

Working at the same rate, how many days would 3 workers take to build the same wall?

A number is multiplied by 3, then 7 is subtracted, then the result is halved, giving 10.

What was the original number?