Paper 1 · Number Theory
⏱ Tested in 1 exam question since 2023
Lesson 2 of 5
Number Theory 2 – Prime Factorisation
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- Write any natural number as a product of primes with the division ladder
- Group repeated primes as powers, e.g. 2 × 2 × 3 × 5 × 7 = 2² × 3 × 5 × 7
- Find the HCF and LCM of large numbers using the Venn-diagram method
- Count the divisors of N from its prime powers: d(N) = (a₁+1)(a₂+1)…
Most recent exam questions
- 2023 P1 Q9(a)(i)
- 2023 P1 Q9(a)(ii)
- 2023 P1 Q9(a)(iii)
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