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

Starting with the 10 at the top, one set of numbers increases by 3 each time, written in alternate boxes as you move down the diagram, and the other set of numbers decreases by 2, written in the boxes remaining. So,

Required Number = 4 - 2 = 2

On each row, add the values of the left hand and central boxes to give the value in the right hand box. So,

Missing Number = 1 + 5 = 6.

In each star diagram, the number in the centre equals the sum of the top three numbers, subtracting the sum of the bottom two numbers. Thus,

Missing Number = 6 + 9 + 2 - 4 + 3 = 10.

1st Column:
It follows sequence of the prime numbers i.e 2, 3 and 5.
2nd Column
It also follows sequence of the prime number i.e 7, 11 and 13.
3rd Column:
So, it also follows prime number sequence.
17, 19 and 23.

The left hand circle element = difference of the number of two circle in their corresponding segment.
Let X is missing. Then its corresponding element in other two circle are 6 and 16. So,
X = 16 - 6 = 10.

Logic (Left to right):
1st digit of the each number increases by 2, Middle digit decreases by 1 and the last digit decreases by 2 and increases by 2 alternatively.

Number after 955 would be 1143.

1st element in 3rd circle = 1st element in 1st circle + 1st element in second circle = 1 + 6 =7
2nd element in 3rd circle = 2nd element in 1st circle + 2nd element in second circle = 3 +5 = 8
Same way,
2 +6 = 8 and
7 + 1 = 8.

In 4th Circle,
1st element = Difference of 1st element of 1st circle and 2nd circle = 6 -1 = 5
2nd element = Difference of 2nd element of 1st circle and 2nd circle = 5 -3 = 2
3rd element = Difference of 3rd element of 1st circle and 2nd circle = 7 - 1 = 6.
So, required element = 6.

Center of the Triangle = (Sum of the vertices )/2

1st Triangle
4 = (4 +3 +1)/2

2nd Triangle
10 = (7 +7 +6)/2

So,
6 = (5 + 3 +x)/2
Or, 12 = 8 +x
x = 4.

Logic:
Element at the Center = Sum of even numbers - Sum of odd numbers or Sum of odd numbers - Sum of even numbers

For 1st Star
8 = (6 +2 +4) - (3 +1)
2nd Star
6 = (11 +9) - (4 +8 +2)
3rd Star
x = (5 + 5 +7) - (10 +2)
x = 5
So, required number = 5.

In each triangle, the number at the apex of the triangle equals the average of the two numbers at the bottom. So,

(5 + x)/2 = 5
5 + x = 10
x = 5.
Missing number = 5.