Answer:
72
Explanation:
First of all, we need the numbers as a product of its prime numbers.
8 = 2×2×2
12 = 2×2×3
18 = 2×3×3
Now we can see that there is one 2 in all three numbers. And also two twos in 8,12 and two threes in 12,18. We need to group it and take it as one. The rest we take it individually each
So 2×2×2×3×3 = 8×9 = 72