SSC CGL 15 September 2025 · Shift 1 · General Intelligence & Reasoning — questions with answers · ShikshaSphere
Chapter 37 of 192
15 September 2025 · Shift 1
General Intelligence & Reasoning
25 questions ~25 min readFree
25 questions
A
1
Sentence: "The hidden galaxy rotates gracefully around the sun." If the 3rd letter of every 2nd word is written in order, what word is formed?
A.pufe
B.yule
C.apf
D.dto
Solution
Letter extraction
Number the words: The(1), hidden(2), galaxy(3), rotates(4), gracefully(5), around(6)…
Every 2nd word gives: hidden, rotates, around.
Their 3rd letters in order: d, t, o.
Reading them together forms 'dto' — option (d).
2
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
IJH, KOO, MTV, OYC, ?
A.QDJ
B.OYD
C.OYB
D.PZD
Solution
Letter series (+2, +5, +7)
Track each position separately.
1st letters: I, K, M, O — +2 each time ⇒ next is Q.
2nd letters: J, O, T, Y — +5 each time ⇒ next is D (cyclic); 3rd letters: H, O, V, C — +7 each time ⇒ next is J.
Hence QDJ — option (a).
3
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series:
HOUA, HRZH, HUEO, HXJV, ?
A.HAOC
B.HXIT
C.HWJT
D.HVKU
Solution
Letter series (+3, +5, +7)
The 1st letter H stays constant in every cluster.
2nd letters: O, R, U, X — +3 each time ⇒ next is A (cyclic).
3rd letters: U, Z, E, J — +5 each time ⇒ next is O; 4th letters: A, H, O, V — +7 each time ⇒ next is C.
Hence HAOC — option (a).
4
If 'A' denotes 'addition', 'B' denotes 'subtraction', 'C' denotes 'multiplication', and 'D' denotes 'division', then what will be the value of the following expression?
5 (7 C 3) B 3 (8 A 6) D 7 B 11 (3 C 13 C 2) A 2 (41 C 9)
What will come at the place of question mark?
2, 6, 21, 88, 445, ?
A.2676
B.2678
C.2876
D.2987
Solution
Series (×n + n)
The pattern is: term × n + n, with n = 2, 3, 4, 5, 6…
2×2+2 = 6; 6×3+3 = 21; 21×4+4 = 88; 88×5+5 = 445 — all verified.
Next: 445×6+6 = 2670+6.
= 2676 — option (a).
6
Identify the assumptions that must hold for the statement to be valid, then choose the correct option.Statement: The introduction of artificial intelligence in education can enhance learning experiences by providing personalized tutoring, but it also raises concerns about data privacy and the replacement of human teachers.
Assumptions:
I. Artificial intelligence can adapt to individual learning needs.
II. There are potential risks related to the misuse of student data.
III. Artificial intelligence will completely eliminate the need for human teachers.
A.Only I and II are implicit
B.Only II and III are implicit
C.Only I is implicit
D.All assumptions are implicit
Solution
Statement — assumptions
Personalized tutoring is only possible if AI can ADAPT to individual learners — so I is implicit.
The 'data privacy concerns' in the statement imply possible misuse of student data — so II is implicit.
III overshoots: the statement mentions a CONCERN about replacement, not a certainty that teachers will be completely eliminated.
Hence Only I and II — option (a).
7
Read the following statement carefully and identify the conclusion that follows.Statement: The city recorded the lowest air pollution levels this winter compared to the last ten years.
Conclusions:
I. Air quality in the city has improved over the years.
II. Pollution levels in the past ten winters were higher than this year.
A.Only Conclusion I follows
B.Only Conclusion II follows
C.Both I and II follow
D.Neither I nor II follows
Solution
Statement — conclusions
'Lowest in ten years' directly means this year's air is cleaner than each of those years — air quality has improved — I follows.
By the same fact, every one of the past ten winters had HIGHER pollution than this year — II follows.
Both conclusions restate the statement without adding anything new.
Hence Both I and II — option (c).
8
How many meaningful four-letter English words can be formed using the first, second, third, and fourth letters of the word "CINEMA" (when counted from left to right), using each letter only once in each word?
A.One
B.Four
C.Two
D.Three
Solution
Word formation — CINE
The first four letters of CINEMA are C, I, N, E.
Meaningful words from all four: NICE (pleasant) ✓ and CINE (relating to films) ✓.
No other arrangement (ICEN, NECI, ENIC…) forms a valid English word.
Two words — option (c).
Address matching
The words match in every set — the PIN code is the deciding part.
Given PIN: 158002. Set 1: 158002 ✓.
Set 2 has 148002, set 3 has 148003, set 4 has 148004 — all differ.
Only set 1 is identical — option (a).
10
In the following question, a pair of letters is given, followed by its corresponding product of alphabetical positions (A=1, B=2, …, Z=26). A second pair of letters is given without its product. Identify the correct product for the second pair that maintains the same relationship as the first.
G×J : 7×10 = B×D : ?
A.6×11
B.2 × 4
C.8×9
D.5 × 12
Solution
Place-value products
Each letter is replaced directly by its alphabetical place value.
G = 7 and J = 10, giving 7×10 — exactly as shown.
For the second pair: B = 2 and D = 4.
So B×D = 2 × 4 — option (b).
11
If a geometric progression (GP) starts at 3.6 and the common ratio (CR) = 1.5, what is the 2nd term?
A.6.2
B.5.4
C.5.0
D.7.6
Solution
GP — 2nd term
In a GP, every term = previous term × common ratio.
2nd term = first term × r.
= 3.6 × 1.5 = 5.4.
Hence option (b).
12
Find the odd one out from the given alternatives:
A.Lok Sabha
B.Rajya Sabha
C.Vidhan Sabha
D.High Court
Solution
Odd one out
Lok Sabha, Rajya Sabha and Vidhan Sabha are all LEGISLATIVE bodies — houses that make laws.
The High Court belongs to the JUDICIARY — it interprets laws.
The category breaks at the High Court.
Hence option (d).
13
Which term is wrong in the series: 2, 5, 10, 17, 26, 38
A.5
B.10
C.38
D.26
Solution
Wrong term (n²+1)
The pattern is n² + 1.
1²+1 = 2, 2²+1 = 5, 3²+1 = 10, 4²+1 = 17, 5²+1 = 26 — all fit.
6²+1 = 37, but the series shows 38.
The wrong term is 38 — option (c).
14
Preeti said, "The man in the photo is my mother's son-in-law." Who is the man to Preeti?
A.Husband
B.Uncle
C.Father
D.Cousin
Solution
Blood relation
Preeti's mother's son-in-law = the husband of her mother's daughter.
Preeti herself is her mother's daughter.
So the man is Preeti’s own husband.
Hence option (a).
If the given symbols mean:
'+' means 'divided by', '−' means 'multiplied by', '×' means 'minus', '÷' means 'plus'
Then, find the value of the following expression: 8×4÷6+12−4 = ?
A.8
B.7
C.6
D.10
Solution
Symbol substitution
Replace every symbol: 8×4÷6+12−4 becomes 8 − 4 + 6 ÷ 12 × 4.
BODMAS: 6 ÷ 12 = , then × 4 = 2.
Now 8 − 4 + 2 = 6.
Hence option (c).
21
P is the brother of Q. R is the father of P. S is the brother of R. T is the son of S. How is T related to Q?
A.Cousin
B.Son
C.Uncle
D.Brother-in-law
Solution
Blood relation
R is the father of P and Q; S is R’s brother — so S is the uncle of Q.
T is the son of S.
The son of an uncle is a cousin.
Hence T is Q’s cousin — option (a).
22
If '×' means '−', '−' means '+', '/' means '×', and '+' means '÷', which of the following is correct?
A.10+4−2×5=10
B.30−6+12/4=32
C.48/8+3−5×1=15
D.20×2−4+8/2=9
Solution
Symbol substitution
Apply the substitutions to option (b): 30−6+12/4 becomes 30 + 6 ÷ 12 × 4.
BODMAS: 6 ÷ 12 = , then × 4 = 2.
30 + 2 = 32 — exactly the right-hand side ✓ (the other three options fail on checking).
Hence option (b).
23
If '+' means '÷', '−' means '×', '×' means '+', and '÷' means '−', then 21÷4−3×7 = ?
Statements:
No lines are squares.
Some squares are triangles.
Conclusions:
I. Some triangles are not lines.
II. No triangles are lines.
A.Only I follows
B.Only II follows
C.Both I and II follow
D.Neither I nor II follows
Solution
Syllogism
The triangles that are squares (given: some squares are triangles) cannot be lines, because NO square is a line.
So at least SOME triangles are definitely not lines — Conclusion I follows.
But other triangles might still be lines — nothing rules that out — so Conclusion II is not certain.
Hence Only I follows — option (a).
Number the words: The(1), hidden(2), galaxy(3), rotates(4), gracefully(5), around(6)…
Every 2nd word gives: hidden, rotates, around.
Their 3rd letters in order: d, t, o.
Reading them together forms 'dto' — option (d).
Track each position separately.
1st letters: I, K, M, O — +2 each time ⇒ next is Q.
2nd letters: J, O, T, Y — +5 each time ⇒ next is D (cyclic); 3rd letters: H, O, V, C — +7 each time ⇒ next is J.
Hence QDJ — option (a).
The 1st letter H stays constant in every cluster.
2nd letters: O, R, U, X — +3 each time ⇒ next is A (cyclic).
3rd letters: U, Z, E, J — +5 each time ⇒ next is O; 4th letters: A, H, O, V — +7 each time ⇒ next is C.
Hence HAOC — option (a).
The pattern is: term × n + n, with n = 2, 3, 4, 5, 6…
2×2+2 = 6; 6×3+3 = 21; 21×4+4 = 88; 88×5+5 = 445 — all verified.
Next: 445×6+6 = 2670+6.
= 2676 — option (a).
Each letter is replaced directly by its alphabetical place value.
G = 7 and J = 10, giving 7×10 — exactly as shown.
For the second pair: B = 2 and D = 4.
So B×D = 2 × 4 — option (b).
The pattern is n² + 1.
1²+1 = 2, 2²+1 = 5, 3²+1 = 10, 4²+1 = 17, 5²+1 = 26 — all fit.
6²+1 = 37, but the series shows 38.
The wrong term is 38 — option (c).
Preeti's mother's son-in-law = the husband of her mother's daughter.
Preeti herself is her mother's daughter.
So the man is Preeti’s own husband.
Hence option (a).
Test the rule a # b = (a − b) × 2b.
Check: (5−2)×4 = 12 ✓ and (7−3)×6 = 24 ✓.
Apply: 9 # 4 = (9−4) × 8 = 5 × 8.
= 40 — option (a).
Decode REACH → SDBDJ letter by letter: R+1=S, E−1=D, A+1=B, C+1=D, H+2=J.
The shift pattern is +1, −1, +1, +1, +2.
Apply to MANGO: M+1=N, A−1=Z, N+1=O, G+1=H, O+2=Q.
Hence NZOHQ — option (b).
Decode WARDEN → XCTEFO: W+1=X, A+2=C, R+2=T, D+1=E, E+1=F, N+1=O.
The shift pattern is +1, +2, +2, +1, +1, +1.
Apply to FLOWER: F+1=G, L+2=N, O+2=Q, W+1=X, E+1=F, R+1=S.
Hence GNQXFS — option (d).
R is the father of P and Q; S is R’s brother — so S is the uncle of Q.
T is the son of S.
The son of an uncle is a cousin.
Hence T is Q’s cousin — option (a).
The triangles that are squares (given: some squares are triangles) cannot be lines, because NO square is a line.
So at least SOME triangles are definitely not lines — Conclusion I follows.
But other triangles might still be lines — nothing rules that out — so Conclusion II is not certain.
Hence Only I follows — option (a).