boy wants to write the number in each field of the figure shown in the image. Each number is the sum of the numbers in the neighbor fields. (neighbor fields are all fields that touch) What number is going to be written in the middle field?
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Given : Three concentric circles divided in few parts
2 numbers are written
Each number is the sum of the numbers in the neighbor fields.
To Find : What number is going to be written in the middle field
Solution:
Assumed that A , B , C and D will come at those 4 places
-4 touches all A , B , C and D
Hence A + B + C + D = - 4
2 touches A , B , C and D and middle number
Let say middle number = x
=> A + B + C + D + x = 2
Substitute A + B + C + D = - 4
=> - 4 + x = 2
=> x = 2 + 4
=> x = 6
number 6 is going to be written in the middle field
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