Number theory

Here is a list of all of the skills that cover number theory! These skills are organised by year, and you can move your mouse over any skill name to preview the skill. To start practising, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

Year 1 skills

  1. A.15 Identify numbers as even or odd
  2. A.17 Which even or odd number comes before or after?

Year 2 skills

  1. A.7 Identify numbers as even or odd
  2. A.8 Select even or odd numbers
  3. A.10 Which even or odd number comes before or after?
  4. O.1 Guess the number

Year 3 skills

  1. A.2 Even or odd
  2. A.3 Even or odd: arithmetic rules
  3. G.7 Divisibility rules for 2, 5 and 10
  4. K.1 Guess the number

Year 4 skills

  1. A.5 Prime and composite numbers
  2. A.7 Even or odd: arithmetic rules
  3. E.13 Divisibility rules
  4. E.14 Divisibility rules: word problems

Year 5 skills

  1. A.7 Even or odd: arithmetic rules
  2. E.1 Prime and composite numbers
  3. E.2 Prime factorisation
  4. E.3 Divisibility rules
  5. E.4 Divisibility rules: word problems
  6. E.5 Highest common factor
  7. E.6 Lowest common multiple

Year 6 skills

  1. C.1 Divisibility rules
  2. E.1 Prime or composite
  3. E.2 Identify factors
  4. E.3 Prime factorisation
  5. E.4 Prime factorisation with exponents
  6. E.5 Highest common factor
  7. E.6 Lowest common multiple
  8. E.7 HCF and LCM: word problems
  9. X.7 Sort factors of expressions

Year 7 skills

  1. A.1 Prime or composite
  2. A.2 Prime factorisation
  3. A.3 Multiplicative inverses
  4. A.4 Divisibility rules
  5. A.5 Highest common factor
  6. A.6 Lowest common multiple
  7. A.7 HCF and LCM: word problems
  8. A.8 Classify numbers
  9. H.1 Identify rational numbers
  10. R.8 Sort factors of expressions

Year 8 skills

  1. A.1 Factors
  2. A.2 Divisibility rules
  3. A.3 Prime or composite
  4. A.4 Prime factorisation
  5. A.5 Highest common factor
  6. A.6 Lowest common multiple
  7. A.7 HCF and LCM: word problems
  8. A.8 Classify numbers
  9. D.1 Identify rational and irrational numbers
  10. E.1 Reciprocals and multiplicative inverses
  11. U.10 Sort factors of expressions

Year 9 skills

  1. A.1 Classify numbers

Year 10 skills

  1. A.1 Identify rational and irrational numbers