In the above picture there are three circles. A number is missing among one of the circle. Your task is to find out the missing number using simple mathematical logic. Can you do it.

The missing number is 30
Explanation:
First Circle: (zeroes in first quadrant number + zeroes in second quadrant number)*5=5*5=25
Second Triangle: (zeroes in first quadrant number + zeroes in second quadrant number)*5=2*5=15
Third Triangle: (zeroes in first quadrant number + zeroes in second quadrant number)*5=6*5=30

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