In the given figure, you can see that there are four circles numbered from 1 to 4. In the fourth circle, a digit is missing. Can you find out a relation and tell which number will suffice the pattern?
The number will be 30.
1. (5 + 4) * 2 = 18
2. (12 + 8) * 3 = 60
3. (3 + 9) * 4 = 48
4. (4 + 2) * 5 = 30
