HCF/LCM using Prime Factors (Junior Cert Mathematics): Flashcards

Largest number that divides numbers without remainder

Smallest number that is a multiple of given numbers

Number only divisible by 1 and itself

Factors of a number that are also prime numbers

Divide by smallest possible primes until you can't divide more

Take lowest power of each prime in all factorisations

Take highest power of each prime in any factorisation

2 and 3

$2^2 \times 3 \times 5$

$2^4 \times 5$

20

240

Simplifying fractions or dividing into equal parts

Finding common time intervals