Area of triangle, perpendicular distance, minimum, pdf, expectation, tetrahedron, distance from point to closest face.
[STEP III 2012 Question 12 (Probability and Statistics)]
Poisson random variable, supermarkets, expectation and variance, integration, pdf.
[STEP II 2012 Question 13 (Mechanics)]
Circular island, concentric regions.
[STEP II 2002 Question 14 (Mechanics)]
Underground Mathematics: Selected worked STEP questions
STEP Question database
University of Cambridge Mathematics Faculty: What do we look for?
University of Cambridge Mathematics Faculty: Information about STEP
University of Cambridge Admissions Office: Undergraduate course information for Mathematics
Stephen Siklos' "Advanced Problems in Mathematics" book (external link)
MEI: Worked solutions to STEP questions (external link)
OCR: Exam board information about STEP (external link)
AMSP (Advanced Maths Support programme): Support for University Admission Tests (external link)