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

Logic:

Add up numbers in corresponding segments of each square.
The sum of the digits in the left hand segments = 20,
The sum of the upper segments = 22,
The right hand segments = 24
The lower segments = 26.

Thus,
13 + 2 + 7 + x = 26.
x = 26 - 22 = 4.
Missing Element = 4.

The Sequence 2, 4 , 3, 7 , 5, 11, 8, 16, 12, x can be divided into two sub sequence such as
2, 3, 5, 8, 12 and
4, 7, 11, 16 , x.

For First Sequence, 2
2 + 1 = 3
3 + 2 = 5
5 + 3 = 8
8 + 4 = 12.
For Second Sequence, 4
4 +3 = 7
7 + 4 = 11
11 + 5 = 16
16 + 6 = 22.
So, Missing Element = 6.

Reading each row as a whole number, multiply the top 2 digit number by the lower 2 digit number to give the result represented by the middle 3 digit number. Thus,

12 * 21 = 25x
25x = 252.
So, x = 2.

Starting with the top circles, multiply each value by 2 and subtract 3, writing the result in the corresponding segment of the lower circle. So,

8 *2 = 16 - 3 = 13.
Missing Number = 13.

Numbers in boxes from the second row up equal the average of the 2 numbers in the boxes directly below. Continue to the apex of the triangle. Thus,

Missing Number = Average of 7 and 5.
Missing number = (7 + 5)/2 = 6.

Reading each line of the diagram as a 3 digit number, add the top and middle lines together to give the result on the bottom line. Thus,

237 + 645 = 882.
Missing Element = 2.

Logic (Row-wise):
Left Element + Right Element - 2 = Central Element.

7 + 3 - 2 = 8.
3 + 2 - 2 = 3.
6 + x - 2 = 5
x = 1.

Working through the diagram in columns, the value at the bottom of each column equals the sum of the top 2 numbers, minus the sum of the next 2 numbers. So,

(3 + 21) - (4 + 9) = x
24 - 13 = x
x = 11.

In each grid, working in columns, add the top and bottom numbers together, and put this sum in the centre square in the grid underneath the original (for the top grids), or the grid above (for the lower grids). So,

5 + x = 13
x = 8.

In each star, the value at the centre equals the difference between the sum of the top 3 numbers and the sum of the bottom 3 numbers.

(5 +6 + 4) - (2 + 1 + 3) = 9.
(11 + 4 + 8) - (7 + 3 + 2) = 11.
(9 + 9 + 2) - (6 + 4 + 5) = x
x = 20 - 15
x = 5.