Missing Number Finding - General Inteligence & Reasoning MCQ Questions and Answers

From top to bottom, reading each pair of numbers as a 2 digit value, the numbers follow the sequence of square numbers, from 16 to 49, each written back to front (Right to Left).

16,
25,
36,
49.
So, Missing Element = 4.

In each row of the diagram, the values in the central circle equal the sums of the digits in corresponding segments of the left and right hand circles. So,

2 + x = 3.
x = 1.
Missing Element = 1.

The sum of the numbers in each column equal 17.
10 + 7 = 17
15 + 2 = 17
So,
9 + x + 6 = 17
x = 2.

5
2 *5 - 4= 6
2 * 6 - 3 = 9
2* 9 - 2 = 16
2 * 16 - 1 = 31.
Missing Number = 31.

Start anywhere on the diagram, and move clockwise, calculating the sum of every third circle. This always equals 15.

Logic (Column-wise):
Central Number = (Upper element + lower element)/2

Thus,
6 = (7 + x)/2
x = 12 -7
x = 5

Logic:
Central Number = Top Number + Lower two numbers - Left number - right number.

Thus, Missing Number,
x = 12 + 12 + 3 - 6 -7
x = 14

Top Row + Middle row = Bottom Row
268 + 373 = Bottom Row
Bottom Row = 641.
Required Element = 1.

Logic ( Row-wise):
First Element + Second element = Result
2 * Result + 1 = Third element.

So, Missing number,
3 + 7 = 10
2 * 10 + 1 = x
x = 21.
Required Number = 21.

For Upper First Circle:
Value in left segment = Sum of the Value in left segment in first and second lower circle. I.e
Value of the any segment = Sum of the value in corresponding segments of lower circle.

For Upper Middle Circle:
Value of the any segment = Product of corresponding segments of lower circles.

For upper Last Circle:
Value in any segment = Difference of the corresponding segments of lower circles.

Thus, Missing element,
7 + x = 10
x = 3.