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?
If N varies directly as M and N = 8 when M = 20 find M when N = 7
