GCSE Maths (Edexcel)

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Basic Powers & Index Notation

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Number Structure and Calculation

Basic Powers & Index Notation

2:06 BIDMAS & Listing
Spec N6 N7
Previous Brackets Next BIDMAS
  • Index notation is used to show a number repeatedly multiplied by itself
  • The base is the number being repeatedly multiplied
  • The index is the number of times the base is being multiplied by itself
  • Example: 5 x 5 x 5 can be written as 5 to the power of 3
  • Example problem: 2 to the power of x is equal to 8
  • Step 1: Write the answer as a repeated multiplication of the base number (2 x 2 x 2 = 8)
  • Step 2: Find x by working out the correct index (2 to the power of 3 = 8)
  • By comparison, x is equal to 3

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