Answer:
2
Step-by-step explanation:
30/2 = 15
15/3 = 5
5/5 = 1
2 * 3 * 5 * y^4
6/2 = 3
3/3 = 1
3 * 2
14/2 = 7
7/7 = 1
2 * 7 * y
Only 2 appears in all the numbers
