Can someone please help me solve the following 3 problems on GMAT PowerPrep Practice Test #1:
#7: Data sufficiency - Determining magnitude of difference between 2 angles in 2 triangles
#15: Arithmetic - If each term in the sum a1+a2+...+an is 7 or 77 and the sum equals 350, which of the following could be equal to n? (Answer 40)
#18: Problem solving - Function f(x)=f(1-x)
I cannot figure these out for the life of me.
Thanks:hmm: