Check your skill with numbers. Find the missing number in the above number puzzle picture. Which number will replace the question mark inside the circle.


The missing number is 4
Explanation:
Left side circle = addition of upper circles numbers
Right side circle= subtraction of upper side numbers
3,5
8=3+5, 2=5-3
10=8+2, 6=8-2
16=10+6, 4=10-6

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