If the simple interest on N2000 after 9 months is N60, at what rate per annum is the interest charged?
Which of the following correctly expresses 48 as a product of prime factors?
Evaluate \((20_{three})^2 - (11_{three})^2\) in base three
In a class of 80 students, every students studies Economics or Geography or both. If 65 students study Economics and 50 study Geography, how many study both subjects?
