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

As you move left to right work down the column, numbers follow the sequence of Square Numbers from 16 to 81, subtracting 4, then 8, then 12 etc. So,

4 * 4 - 4 = 12.
5 * 5 - 8 = 17.
6 * 6 - 12 = 24.
7 * 7 - 16 = 33.
8 * 8 - 20 = 44.
Missing number = 9 * 9 - 24 = 57.

Splitting the diagram into 3 smaller triangles, with 3 circles each, the sum of the numbers in each smaller triangle is always 21. So,

3 +7 + 11 = 21.
5 + 12 + 4 = 21.
10 + 10 + x = 21.
x = 1.
Missing Number = 1.

Working left to right, double each number and subtract 5 to give the next number. So,

Missing number = 37 * 2 - 5 = 69.

Working in columns, the sum of the numbers in each column equals 18.

Starting on the top left, and moving clockwise in a spiral towards the centre, numbers increase by 7, then decrease by 2. Repeat this pattern all the way around. So,

Missing Number = 18 - 2 = 16.

Working from left to right numbers follow the sequence of Prime Numbers, subtracting 1 each time. So,

2 - 1 = 1
3 -1 = 2
5 - 1 = 4
7 - 1 = 6
11 - 1 = 10
Missing Number = 10.

Working left to right around the diagram, add the first two numbers together and subtract 3 to give the next number along. So,

11 + 16 - 3 = Missing Number
Missing Number = 24.

In each circle, the sum of the numbers in the left hand half of the circle equals double that of the numbers in the right hand half of the circle.

Starting with the diagram in the top left, and moving to the right, ending up with the bottom diagram, average the values in the top two boxes and put the result in the lower box, adding 1 for the first diagram, 2 for the next, then 3, then 4. So,

X = {(8 +6)/2} + 4 = 7 + 4 = 11.

Working in rows, top to bottom, reading each row as a 3 digit number, rows follow the sequence of Square Numbers from 11 to 13.