While solving the number puzzle, I couldn't find any solution for this problem. Please help me solve it and briefly explain your answer. Which number will replace the question mark in the circle below?
In the first row,
The number in the middle circle is the sum of the numbers in the left and right circles in the same positions.
In the second row,
The number in the middle circle is the difference between the numbers in the left and right circles in the same positions. It does not matter which is subtracting from which, it is the absolute difference.
If we number the circles as follow:
First row A B C
Second row D E F
On the first row we get for each corresponding sector B(n) = A(n) + C(n)
namely: 5 = 2 + 3, 7 = 6 + 1, etc.
On the second row the rule seems to change to alternating D(n) - E(n) = F(n)
and in the next segment D(n+1) + E(n+1) = F(n+1)
Starting from top left we get 7 - 1 = 6, 1 + 4 = 5, 8 - 6 = 2, 2 + ? = 9
Which leads us to ? = 7