Question

What is the highest common factor of 12 and 49?

Answer 1

Factors of 12 . . . . . 1, 2, 3, 4, 6, 12

Factors of 49 . . . . . 1, 7, 49

Common factors . . . 1

Highest common factor . . . 1

Answer 2

$12|2\\.\ 6|2\\.\ 3|3\\.\ 1|\\==========\\49|7\\.\ 7|7\\.\ 1|\\==========\\\\HCF(12;\ 49)=1$