Question

What is the HCF of 12,15,18?
plz show with proper explanation...

Answer 1

factors of 12 are: 1,2,3,4,6,12
factors of 15 are: 1,3,5,15
factors of 18 are: 1,2,3,6,9,18
Therefore the highest common factor is 3

Answer 2

The factor of 12,15,18 are
12=2x2x3
15=1x1x3x5
18=2x1x3x3

so HCF is 3
As 3 is the common in all
Hope it helps you