IMC Key Stage 3 · 4. Primes, divisors and integer equations
Factor every number into primes, count divisors, use squares and turn integer equations into products of brackets.
IMC Key Stage 3 – Selected topics
Use parity and factorisation to decide when an expression can be prime.
Count divisors from a prime factorisation and work with gcd and lcm.
Recognise and use the properties of perfect squares.
Solve integer equations by writing them as a product equal to a known number.
Check that a list of cases is complete and verify every answer.