Challenge your mind with four IQ puzzles

In 30 seconds, find the pattern of the given numbers to fill in the missing number in the question mark.

Question 1:

>>Answer

Question 2:

>>Answer

Question 3: Fill in each circle with a single digit so that the sum of the three circles in the row is 9. Note, each digit appears only once.

>>Answer

Question 4:

>>Answer

According to Bright side, Fun with Puzzles

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