12
3 4
2 2
3 x 2x 2
18
9 2
3 3
2 x 3 x3
= 6
Answer:
6
Step-by-step explanation:
12 = 4 * 3 = 2 *2 * 3
18 = 2 * 9 = 2*3 *3
Highest common factor = 2 * 3 = 6
