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# Reasoning Questions for SSC CGL Exam

Q1. Pointing to a boy, Pooja said, “He is the son of my paternal grandfather’s only daughter.” How is Pooja related to the boy?
(a) Mother
(b) Maternal Aunt
(c) Paternal Aunt
(d) None of these
Ans.(d)
Sol.  Boy = son of Pooja’s grandfather’s only daughter
= son of Pooja’s paternal aunt
= Pooja’s cousin
Hence, Pooja is also the boy’s cousin.

Directions(2-6):What should come in place of question mark (?) in the following number series?

Q2. 11, 10, 18, 51, 200, (?)
(a) 700
(b) 775
(c) 965
(d) 995
Ans.(d)
Sol.  The pattern of the number series is as given below:
11 × 1 – 1 = 10
10 × 2 – 2 = 18
18 × 3 – 3 = 51
51 × 4 – 4 = 200
200 × 5 – 5 = 995

Q3. 161 , 164 , 179 ,  242 ,  497 ,  (?)
(a) 1530
(b) 1510
(c) 1520
(d) 1555
Ans.(c)
Sol.

Q4. 122 , 170 , 290 , ?
(a) 469
(b) 355
(c) 222
(d) 362

Ans.(d)
Sol.  (11)2 = 121+1= 122,
(13)2= 169+1= 170
(17)2= 289 + 1= 290,
Similarly

(19)2 = 361 + 1 = 362

Q5. PRLN , QSMO, ?
(a) RTNK
(b) RSNP
(c) RTNP
(d) KTNP
Ans.(c)
Sol.  P — +2—> R
R— -6—> L
L—+2— ->  N
N–+3->Q
There is a gap of 3 between last letter and the next first letter
O—+3->R
R—+2->T
T– -6– > N
N–+2–>P

Q6. 2 ,3 , 8 , ?
(a) 64
(b) 63
(c) 20
(d) 16

Ans.(b)
Sol. 22= 4-1= 3
32= 9-1 = 8

82= 64-1= 63

Directions(7-9):In each of these questions, a number series is given. In each series, only one number is wrong number. Find out the wrong number.

Q7. 9050 ,  5675 ,  3478 ,  2147 ,  1418 ,  1077 ,  859
(a) 9050
(b) 859
(c) 5675
(d) 1077
Ans.(d)
Sol.  The pattern of number series is as follows:
9050 – 153 = 9050 – 3375 = 5675
5675 – 133= 5675 – 2197 = 3478
3478 – 113= 3478 – 1331 = 2147
2147 – 93= 2147 – 729 = 1418
1418 – 73= 1418 – 343 = 1075  

Q8. 8 , 12 , 24 , 46 , 72 , 108 , 216
(a) 216
(b) 24
(c) 46
(d) 108
Ans.(c)
Sol.  The series is
×1.5, × 2, ×1.5, ×2, ×1.5, ×2, …..
24×1.5 = 36
So, 46 is wrong.

Q9. 7 , 12 , 40 , 226 , 1742 , 17854
(a) 17854
(b) 12
(c) 40
(d) 1742
Ans.(d)
Sol.  The pattern of number series is as follows:
7 × 2 – (0 + 2) = 12
12 × 4 – (2 + 6) = 48 – 8 = 40
40 × 6 – (4 + 10) = 240 – 14 = 226
226 × 8 – (6 + 14) = 1808 –  20= 1788  
1788× 10 – (8 + 18) = 17880 – 26 = 17854

Q10. ’34’ is related to ’12’ in the same way as ’59’ is related to
(a) 45
(b) 44
(c) 82
(d) 65
Ans.(a)
Sol. The second number is the product of the digits of the first.

Q11. Which one of the letters when sequentially placed at the gaps in the given letter series shall complete it?
a – c a – ab – a – ab – ab
(a) b b a b c
(b) b a b a a
(c) a a b b b
(d) b b c b c
Ans.(d)
Sol.  The series is abcab/abcab/abcab

Q12. A disease would always necessarily have—
(a) Medicine
(b) Cause
(c) Cure
(d) Fever
Ans.(b)
Sol. (a) and (c) are what happens after a disease. (d) is its symptom
but not a definite one. (b) is a probable cause.

Q13. Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group?
(a) PM
(b) EB
(c) TQ
(d) VY
Ans.(d)
Sol. Q14. Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group?
(a) Volume
(b) Size
(c) Large
(d) Shape
Ans.(c)
Sol.  ‘Large’ is an adjective whereas others are noun.

Q15. Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group?
(a) Diabetes
(b) Smallpox
(c) Conjunctivitis
(d) Chickenpox
Ans.(a)
Sol.  Except Diabetes, all others are infectious diseases. Join India's largest learning destination

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