IAL Pure 2 Binomial Expansion exam questions

Exam-style binomial expansion questions for Edexcel IAL Pure 2 (WMA12): Pascal’s triangle, factorial notation, finding coefficients and estimation, with full solutions.

This resource covers the whole of Chapter 4 (The Binomial Expansion) of the Pearson Edexcel International A Level Pure Mathematics 2 course. All questions are original and written in the style of the WMA12 paper.

What’s covered

Pascal’s triangle and its use in expansions
Factorial notation and binomial coefficients
The binomial expansion of (1 + x) to the power n
The binomial expansion of (a + bx) to the power n
Finding a particular term or coefficient without expanding fully
Using a binomial expansion for estimation and approximation

How to use it

Suitable as homework, as in-class practice, or as revision. A deliberate proportion of the questions ask for one specific coefficient rather than the whole expansion, since that is the more common exam demand and the one that separates students who understand the general term from those who expand mechanically.

What’s included

Question paper (PDF, printable)
Full worked solutions (PDF) — complete method, not just final answers
Questions arranged in increasing difficulty

Specification

Written for Edexcel International A Level Mathematics, Pure Mathematics 2 (WMA12), Chapter 4. Also suitable for Edexcel A Level Mathematics 9MA0 and for any A Level course covering the binomial expansion.