H.C.F- The highest common factor of two or more given number is the highest (or greatest) of their common factor.

e.g. 24 = 1,2,3,4,**6**,8,12,24

36 = 1,2,3,4,**6**,9,12,36

H.C.F = 6

Method Factorization:

Euclid’s Algorithm

determining the HCF of 18 & 30.

Lowest /least common multiple- the lowest common multiple of two numbers is smallest natural number which is a multiple of both the number.
Example LCM of 4 an d 6
Multiple of 4 are 8 **12** 16 20

Multiple of 6 are **12** 18 24

So LCM of 4 and 6 are 12

Method factorization

So

The product of the H.C.F & L.C.M of two numbers is equal to the product of the number.

**Example: **

Given number 16 and 24.

their and

then

Absolute value of integer |-5| = 5, but -|5| = 5, |+5| = 5