LCM and HCF

The least or lowest common multiple (LCM) of two or more numbers is the smallest number into which they evenly divide. For example, the LCM of 2, 3, 4, 6 and 9 is 36.

The highest common factor (HCF) or Greatest Common Divisor of two or more numbers is the highest number which will divide into them both. Therefore the HCF of 8 and 12 is 4.