Circle Puzzles: Can You Find the Missing Number?

This puzzle video contains very interesting Missing Number Puzzles. It contains Circle Puzzles in which your challenge is to find the value of the missing number. In each of these puzzles, you will see some number in the Circle. These numbers relate to each other logically or mathematically. Your challenge to decode the relationship among the given numbers in the Circle. Once you are able to decipher this relationship, find the value of the missing number which will replace the question mark in the Circle.
Let's see how many missing numbers you can find correctly in your first attempt.

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