Answer: it's 10
Explanation:
30 = 1 2 3 4 5 6 10 15 30 (all the factors of 30)
40 = 1 2 3 4 5 8 10 20 40 (all the factors of 40)
Ok you'll find the same numbers but the highest and it's 10.
8.2m questions
10.9m answers