INTRODUCTION
In this type of questions, a figure or a matrix is given in
which some numbers are filled according to a rule. A place is left blank. You
have to find out a character (a number or a letter) from the given possible
answers which may be filled in the blank space.
Some examples are given below:
Example 1:
Which number will replace the question mark ?
Solution :
From fig. a: 6 + 4 + 8 = 18
18 + 2 = 20
From fig. b: 7 + 9 + 8 = 24
24 + 2 = 26
From fig. c: 6 + 5 + 12 = 23
23 + 2 = 25
Hence the number 25 will replace the question mark.
Example 2:
Which number will replace the question mark ?
Solution :
From fig. a: (3)2 + (2)2
= 13
From fig. b: (4)2 + (8)2
= 80
From fig. c: ? = (1)2 + (5)2
? = 1 + 25
? = 26
Hence the number 26 will replace the question mark.
Example 3:
Which number will replace the question mark ?
Solution :
From fig. a: 7 x 6 + 3 = 45
From fig. b: 5 x 4 + 6 = 26
From fig. c: 7 x 3 + 8 = 29
Hence the number 29 will replace the question mark.
Example 4:
Which number will replace the question mark ?
Solution :
From fig. a: 92 + 82 + 72
+ 62 = 81 + 64 + 49 + 36 = 230
From fig. b: 62 + 72 + 32
+ 42 = 36 + 49 + 9 + 16 = 110
From fig. c: 92 + 62 + 52
+ 42 = 81 + 36 + 25 + 16 = 158
Hence the number 158 will replace the question mark.
Example 5:
Which number will replace the question mark ?
Solution :
(4 + 3)2 = (7)2 = 49
(8 + 5)2 = (13)2 = 169
(11 + 12)2 = (23)2 = 529
(10 + 9)2 = (19)2 = 361
Hence the number 361 will replace the question mark.
QUESTION SET:
Q1.Which one will replace the question mark ?
A.L10
B.K15
C.I15
D.K8
Q2.Which one will replace the question mark ?
A.1
B.4
C.3
D.6
Q3.Which one will replace the question mark ?
A.18
B.12
C.9
D.6
Q4.Which one will replace the question mark ?
A.25
B.37
C.41
D.47
Q5.Which one will replace the question mark ?
A.45
B.41
C.32
D.40
ANSWERS:
1. Answer: D
Explanation:
How the number is obtained?
2 + 4 = 6
5 + 9 = 14
Similarly,
3 + 5 = 8
Therefore, the answer is K8.
2. Answer: D
Explanation:
(5 + 4 + 7)/2 = 8
(6 + 9 + 5)/2 = 10
(3 + 7 + 2)/2 = 6.
3. Answer: C
Explanation:
(12 + 18 + 30)/10 = 6
(16 + 24 + 40)/10 = 8
Similarly, (45 + 18 + 27)/10 = 9.
4. Answer: C
Explanation:
(5 x 3) + 4 = 19
and (6 x 4) + 5 = 29
Therefore, (7 x 5) + 6 = 41
5. Answer: A
Explanation:
(15 x 2 - 3) = 27,
(31 x 2 - 6) = 56
and (45 x 2 - 9) = 81