A bus leaves its station every 15 minutes. The tenth bus leaves the station at 9 am. At what time does the first bus leave the station ?IKMC Grade 1 - 2
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A “ Happy Holiday!” greeting was exchanged exactly once between two good friends. How many “ Happy Holiday!” greetings were exchanged among five good friends ?
There are two paths linking a school to a park. From the park, there are three paths leading to the library. There are four paths from the library to a shopping mall. How many different ways are there to go to the shopping mall from the school ?