Pass Check: Factors, Multiples & Primes
Find factors, multiples, primes, HCF, LCM and prime factor decomposition.
Prime number
A number greater than 1 with exactly two factors: 1 and itself, e.g. 2, 3, 5, 7, 11.
Factor
A number that divides exactly into another number with no remainder.
Highest Common Factor (HCF)
The largest number that divides exactly into two or more numbers.
Lowest Common Multiple (LCM)
The smallest number that is a multiple of two or more numbers.
Quick check
Mixed quiz
1. Find the highest common factor (HCF) of 56 and 98.
2. Find the lowest common multiple (LCM) of 120 and 80.
3. Find the lowest common multiple (LCM) of 60 and 90.
4. Find the highest common factor (HCF) of 84 and 36.
5. Find the highest common factor (HCF) of 72 and 48.
6. Which number is a multiple of 9?
7. Find the highest common factor (HCF) of 120 and 80.
8. Find the highest common factor (HCF) of 60 and 90.