Review later

Here is a list of questions I need to review later (when I know more than I know now):
OG12 Diagnostic test
Quantitative:
5 (Geometry Volume)
10 (Geometry Angles and their measure)
13 (Arithmetic Operations on rational numbers)
14 (Arithmetic Operations on rational numbers) - I solved it differently and got the right answer
20 (Geometry Volume)
22 (Geometry Volume)
28 (Geometry Triangles)
36 (Geometry Circles)
39 (Geometry Coordinate geometry)
41 (Algebra Inequalities)
44 (Arithmetic Properties of numbers)
48 (Geometry Rectangle; Perimeter; Area)