SISC_SHS_TugOWits_2025_Elimination_Average_Round

If the domain of f(x) = 1/(x-3) is all real numbers, what value(s) must be excluded?

• 0

• 3

• -3

• 1/3

A doctor is examining the sounds of a patient’s heart. He can hear the “lub” sound but not the normal “dub” sound. What is a reasonable explanation for the doctor’s observations?

• The tricuspid and mitral valves are not closing properly

• The tricuspid and mitral valves are not opening properly

• The aortic and pulmonary valves are not closing properly

• The aortic and pulmonary valves are not opening properly

Which substance in the diagram is the anode?

• V

• Fe

• Na

• Cu

Which of the following is an example of an open-source operating system?

• macOS

• Linux

• iOS

• Windows

The diagram shows a boy of weight 500N sitting on a see-saw. He sits 2.0m from the pivot. What is the force F needed to balance the see-saw?

• 250 N

• 750 N

• 1000 N

• 3000 N