Practice MCQ Questions and Answer on Missing Number Finding

81.

Find the missing number?

(A) 19
(B) 25
(C) 21
(D) 28

Solution:

 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.

82.

Find the missing number?

(A) 20
(B) 28
(C) 58
(D) 34

Solution:

 Working from top to bottom, The sum of the numbers in each row is put in the left hand box on the row below, and the difference between the two numbers in each row is put in the right hand box on the row below. I.e. Row one First Element + Row one second element = Row two first Element. Difference of first row elements = Row two second Element. And So on. Thus, Row fifth first element + row fifth second element = Row sixth first element 32 + 12 = 44 And, 32 - 12 = 20 ( Row sixth second element).

83.

Find the missing number?

(A) 11
(B) 14
(C) 7
(D) 1

Solution:

 In each diagram, the number at the top equals the average of the four lower numbers. So, 9 = (8 + 3 + 11 +x )/4 9 * 4 = 22 + x x = 36 - 22 = 14. Missing Element = 14.

84.

Find the missing number?

(A) 1
(B) 9
(C) 11
(D) 7

Solution:

 Logic ( Top to Bottom): Sum in the row increase by 5. 5 7 + 3 = 10 5 + 8 + 2 = 15. So, 9 + 6 + 4 + 1 = 20 x = 1.

85.

Find the missing number?

(A) 6
(B) 2
(C) 9
(D) 3

Solution:

 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.

86.

Find the missing number?

(A) 8
(B) 1
(C) 0
(D) 7

Solution:

 Logic (Row-wise): Sum of each Row element = 18. So, 18 = 0 + 6 + 5 + x. x = 7. Missing number = 7.

87.

Find the missing number?

(A) 9
(B) 6
(C) 5
(D) 1

Solution:

 2 + 4 + 9 +7 =22 11 + 2 + 6 +3 = 22 5 + 6 + 5 +6 = 22 So, 1 + 4 + x +8 = 22 x = 22 - 8 - 4 -1 = 9

88.

Find the missing number?

(A) 1
(B) 8
(C) 4
(D) 7

Solution:

 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.

89.

Find the missing number?

(A) 10
(B) 7
(C) 15
(D) 3

Solution:

 Logic (Column-wise): Sum of the element in each column = 21. So, 6 + 12 + x = 2. x = 3.

90.

Find the missing number?

(A) 5
(B) 9
(C) 13
(D) 11

Solution:

Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board

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Practice MCQ Questions and Answer on Missing Number Finding

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