A corner shop makes 50¢ for each water bottle they sell.
Today the shop sold 30 water bottles.
How much money did the shop make from these sales?

John’s height is more than 139 cm and less than 143 cm.
Which of these could be John’s height?

A primary school swimming carnival is on 3rd August.
Roger wants to start training each day at least 8 days before the carnival.
What is the last day to start his training?