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Indices

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Annotated summary showing 5 cubed with base and index labelled and boxes for the multiply, divide and power of a power index laws

An index tells you how many times a base is multiplied by itself. In 535^353, the 5 is the base and the 3 is the index.

53=5×5×5=1255^3 = 5 \times 5 \times 5 = 12553=5×5×5=125, so a power is a quick way to write repeated multiplication. The summary diagram also previews the three laws you will use most often.

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Question 1

3 marks

Simplify x8×x3x^8 \times x^3x8×x3

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In the expression x5x^5x5, what is the mathematical name for xxx and 555?

Indices Revision Guide

  1. GCSE
  2. /Maths
  3. /Indices

Revision notes for Edexcel GCSE Maths Indices. Open the guide for explanations and worked examples. Written against the Edexcel GCSE Maths (1MA1) specification, so the content matches what's examinable rather than general Maths background.

Revision guides

Practise questions

1 of 5

Simplify y5×y3y^5 \times y^3y5×y3.