Paper 1 · Number Theory Lesson 5 of 5

LCOL Number Theory 5: Surds

This tutorial is for members

Read the lesson notes free below — subscribe to watch the full worked video and download the PDF.

Subscribe for full access · €199/yr

You’ll learn

  • Simplify a surd using the largest square factor
  • Multiply out brackets that contain surds

Most recent exam questions

  • 2026 P2 Q7(a)(i)

💬 Stuck on something in this lesson?

Send your question with this lesson’s name attached — you’ll get a reply by email.