Infosys Puzzle Solving Previous Year Questions

31 July 2024

Infosys Puzzle Solving Questions

Q1) Given is the set of nine numbers that relate to each other in a certain way.

Determine the missing number.




A. 4

B. 7

C. 3

D. 90
 
Answer : Option A
Explanation: 


 

1* 5 = 5

2*5 = 10

3*5 = 15

Hence 4* 5 = 20

Therefore, ? = 4

 

Q2) Find the missing terms in the third figure. Assume the third figure works in the same way as the other two.



A. A=9,B=17

B. A=14,B=22

C. A=14,B=28

D. A=18,B=9
 
Answer : Option C
Explanation: 

14 +8 = 22

22/2 = 11

Similarly

12+8 = 20

20/2 = 10

Hence,



20 + 8 = 28 (B)

28/2 = 14 (A)

A = 14 and B = 28

 

Q3) Find the missing term in the third figure. Assume the third figure works in the same way as the other two.



A. 50

B. 110

C. 61

D. 26
 
Answer : Option D
Explanation: 

Figure 1 -- 2, 4 & 20

which is 2×2+4×4=20

Figure 2 -- 3,9 & 90

which is 3×3+9×9=90

therefore, 1,5=1×1+5×5=26

 

Q4) Which number should replace the question mark in the series: 14, 17, 22, 29, ? 

A. 40 

B. 39 

C. 41

D. 43 
 
Answer : Option A
Explanation: 

14 +3 = 17

17 + 5 =22

22+7 = 29

Therefore, the next number will be 29+11 = 40

 

Q5) If sum of digits of a number 3Q6 is 9 then Q is ____. 

A. Three 

B. Two 

C. One 

D. Zero 
 
Answer : Option D
Explanation: 

If sum of digits of a number 3Q6 is 9 then Q is 0

3 + Q + 6 = 9

Q = 0

 

Q6) If X + X + X =33; X + Y + Y = 31 then X + Y = ? 

A. 21 

B. 18 

C. 16 

D. 12
 
Answer : Option A
Explanation: 

If X + X + X =33

3X=33

X = 11

Sub X=11

 X + Y + Y = 31

2Y +11 = 31

2Y = 20

Y = 10

then X + Y = 11+10 = 21

 

Q7) The missing number in the sequence : 25, 36, 49, ?, 81 is ___. 

A. 64 

B. 60 

C. 72 

D. 68 
 
Answer : Option A
Explanation: 

The missing number in the sequence 25, 36, 49,?, 81 is 64

25 = 52

36 = 62

49 = 72

64 = 82

81 = 92



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