Which of the terrestrial planets has the highest surface gravity? (Hint: if you look at ratios, you need not calculate every surface gravity value explicitly.)

Answer 1

You will need a table of mass M and radius R for each planet. Then compute and compare the M/R^2 values. The planet with the highest value has the highest surface g.

Answer 2

You could also compare M/D^2 values, if all you can find is diameters. You will find the answer at
http://www.astro-tom.com/getting_started/planet_classification.htm