SSC CGL 17 September 2025 · Shift 2 · General Intelligence & Reasoning — questions with answers · ShikshaSphere
Chapter 65 of 192
17 September 2025 · Shift 2
General Intelligence & Reasoning
25 questions ~25 min readFree
25 questions
A
1
If each letter is coded as its position in reverse (Z = 1, Y = 2, …, A = 26), what is TOAD?
A.7, 12, 25, 23
B.7, 12, 26, 23
C.9, 13, 24, 23
D.9, 12, 26, 22
Solution
Reverse place values
Reverse position = 27 − (normal position).
T is 20th ⇒ 27 − 20 = 7; O is 15th ⇒ 27 − 15 = 12.
A is 1st ⇒ 26; D is 4th ⇒ 23.
Hence 7, 12, 26, 23 — option (b).
2
Choose the address that is exactly the same as the one given below.
A-7, Lotus Enclave, Boring Road, Patna, Bihar - 800017
Address matching
(a) and (d) change the house number to A-5 and the PIN to 800013.
(c) drops the hyphen (A7) and gives PIN 800019; (d) also misspells the road.
Only (b) matches the given address exactly.
Hence option (b).
3
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
GWH, JSM, MOR, PKW, ?
A.PKW
B.SGB
C.PWK
D.PJV
Solution
Letter series (+3, −4, +5)
1st letters: G, J, M, P — +3 each ⇒ next is S.
2nd letters: W, S, O, K — −4 each ⇒ next is G.
3rd letters: H, M, R, W — +5 each ⇒ next is B (cyclic).
Hence SGB — option (b).
4
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series:
FESU, HIVX, JMYA, LQBD, ?
A.ZBCX
B.QCTR
C.PYSB
D.NUEG
Solution
Letter series (+2, +4, +3)
1st letters: F, H, J, L — +2 each ⇒ next is N.
2nd letters: E, I, M, Q — +4 each ⇒ next is U.
3rd letters: S, V, Y, B — +3 each ⇒ E; 4th letters: U, X, A, D — +3 each ⇒ G.
Hence NUEG — option (d).
5
Find the two signs to interchange to correct the equation.
40 − 12 ÷ 3 × 2 + 6 = 164
A.÷ and −
B.− and ×
C.× and +
D.÷ and +
Solution
Interchange signs
Interchange − and × : the equation becomes 40 × 12 ÷ 3 − 2 + 6.
BODMAS: 40 × 12 = 480, then 480 ÷ 3 = 160.
160 − 2 + 6 = 164 ✓ — it matches the right-hand side.
Hence − and × — option (b).
6
A is the daughter of B. B is the son of C. D is the wife of C. How is A related to D?
A.Mother
B.Granddaughter
C.Aunt
D.Sister
Solution
Blood relation
C and D are husband and wife, and B is their son.
A is B’s daughter, i.e. one generation below B.
So A is the granddaughter of C and D.
Hence option (b).
7
Find the missing term: 6, 19, 77, 386, ____, 16220
A.2678
B.2317
C.2679
D.2680
Solution
Series (×n + 1)
The pattern is × n + 1 with n = 3, 4, 5, 6, 7.
6×3+1 = 19, 19×4+1 = 77, 77×5+1 = 386 ✓.
Next: 386 × 6 + 1 = 2317; check 2317 × 7 + 1 = 16220 ✓.
Hence 2317 — option (b).
8
Find the odd one out:
A.4 # 3 = 12
B.5 # 3 = 15
C.5 # 4 = 20
D.8 # 1 = 24
Solution
Odd one — multiplication
Replace # with × : first × second = third.
4×3 = 12 ✓, 5×3 = 15 ✓, 5×4 = 20 ✓.
But 8×1 = 8, not 24 ✗.
Hence option (d).
9
Identify the assumptions that must hold for the statement to be valid, then choose the correct option.Statement: The successful landing of spacecraft on Mars marks a major achievement in space exploration and opens the door for future manned missions to the planet.
Assumptions:
I. Landing on Mars is a significant step in advancing space research.
II. Future missions to Mars are being planned.
III. Manned missions to Mars will face no challenges.
A.Only I and II are implicit
B.Only II and III are implicit
C.Only I is implicit
D.All I, II, and III are implicit
Solution
Statement — assumptions
Calling the landing a 'major achievement' assumes it advances space research — I is implicit.
'Opens the door for future manned missions' assumes such missions are on the agenda — II is implicit.
III claims a challenge-free journey — an extreme idea the statement never suggests.
Hence Only I and II — option (a).
10
Read the following statement carefully and identify the conclusion that follows.Statement: The number of students opting for the science stream has decreased this year.
Conclusions:
I. Students find science subjects difficult.
II. Students may be more interested in commerce and arts.
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
A fall in science enrolment does suggest that students find the subjects hard — a reasonable inference.
It equally suggests they may be shifting towards commerce and arts — note the cautious word MAY.
Both are possible explanations of the same fact.
Hence Both — option (c).
11
Find the group of letters that best completes the analogy based on the given letter transformation pattern.
SQUARE : TRVDSD :: CIRCLE : ?
A.YTUBN
B.DJSFMD
C.CVBGF
D.QWERTY
Solution
Coding (+1, +3, −1)
SQUARE → TRVDSD: S+1 = T, Q+1 = R, U+1 = V, A+3 = D, R+1 = S, E−1 = D.
So the shifts by position are +1, +1, +1, +3, +1, −1.
CIRCLE: C+1 = D, I+1 = J, R+1 = S, C+3 = F, L+1 = M, E−1 = D.
Hence DJSFMD — option (b).
12
Read the following statement carefully and identify the conclusion that follows.Statement: All trees are living beings. Some living beings are humans.
Conclusions:
I. Some trees are humans.
II. All humans are trees.
A.Only I follows
B.Only II follows
C.Both I and II follow
D.Neither I nor II follows
Solution
Syllogism
The humans mentioned are only SOME living beings — they need not overlap with the trees at all.
So I is not certain.
II is an even stronger universal claim, far beyond the data.
Hence Neither follows — option (d).
13
Find the letter which lies exactly midway between the 1st and 4th letters of the following word in the English alphabet series.
MUTE
A.F
B.I
C.V
D.Z
Solution
Middle letter
In MUTE, the 1st letter is M (13th) and the 4th letter is E (5th).
The midpoint of their positions = = 9.
The 9th letter of the alphabet is I.
Hence option (b).
14
Complete the series.
C2, E3, G4, I5, ?
A.J5
B.K6
C.H5
D.K5
Solution
Series — letters +2, numbers +1
Letters: C, E, G, I — each moves +2 ⇒ next is K.
Numbers: 2, 3, 4, 5 — each rises by 1 ⇒ next is 6.
So the next term is K6.
Hence option (b).
15
Find the odd one out from the given alternatives:
A.Capitalism
B.Socialism
C.Communism
D.Barter
Solution
Economic systems
Capitalism, socialism and communism are ECONOMIC SYSTEMS.
Barter is only a method of exchanging goods without money.
It is not an economic system.
Hence option (d).
16
In a certain code language, each letter is assigned a unique digit. Based on the given codes for specific words, determine the code for the target word using the same logic.
If HOUSE is coded as 45271 and RAT as 986, how is SHORE coded?
A.74591
B.74693
C.78345
D.76278
Solution
Letter–digit code
From HOUSE = 45271: H = 4, O = 5, U = 2, S = 7, E = 1.
From RAT = 986: R = 9, A = 8, T = 6.
SHORE = 7, 4, 5, 9, 1.
= 74591 — option (a).
17
If 4 @ 4 = 20 and 2 @ 3 = 7, then 6 @ 4 = ?
A.41
B.40
C.45
D.47
Solution
Number puzzle (a² + b)
Rule: a @ b = a² + b.
Check: 4² + 4 = 20 ✓; 2² + 3 = 7 ✓.
6 @ 4 = 36 + 4.
= 40 — option (b).
18
In a code language, 'CROW' is written as 'H@3X', and 'WORF' is written as 'X3@H'. How is 'FOWR' written?
A.H@X3
B.XH3@
C.H3X@
D.X@H3
Solution
Letter–symbol code
From CROW = H@3X: C = H, R = @, O = 3, W = X.
From WORF = X3@H: W = X, O = 3, R = @, F = H.
FOWR = F, O, W, R = H, 3, X, @.
= H3X@ — option (c).
In an 80 L solution, the ratio of acid to water is 3 : 1. How much water must be added to make it 1 : 1?
A.50 L
B.20 L
C.40 L
D.90 L
Solution
Mixture — add water
Acid = × 80 = 60 L; water = × 80 = 20 L.
Acid stays fixed, so = .
20 + x = 60.
x = 40 L — option (c).
21
A + B means A is the mother of B, A − B means A is the brother of B, A * B means A is the sister of B. Then what does X − Y + Z mean?
A.X is brother-in-law of Z
B.X is maternal uncle of Z
C.X is brother of Z
D.X is father of Z
Solution
Coded relations
X − Y means X is the brother of Y.
Y + Z means Y is the mother of Z.
So X is the brother of Z’s mother — that is Z’s maternal uncle.
Hence option (b).
22
If 'X' means '+', 'Y' means '−', 'W' means '×', and 'Z' means '÷', what is the value of the following expression?
18 Z 3 X 5 W 2 = ?
Reverse position = 27 − (normal position).
T is 20th ⇒ 27 − 20 = 7; O is 15th ⇒ 27 − 15 = 12.
A is 1st ⇒ 26; D is 4th ⇒ 23.
Hence 7, 12, 26, 23 — option (b).
1st letters: G, J, M, P — +3 each ⇒ next is S.
2nd letters: W, S, O, K — −4 each ⇒ next is G.
3rd letters: H, M, R, W — +5 each ⇒ next is B (cyclic).
Hence SGB — option (b).
1st letters: F, H, J, L — +2 each ⇒ next is N.
2nd letters: E, I, M, Q — +4 each ⇒ next is U.
3rd letters: S, V, Y, B — +3 each ⇒ E; 4th letters: U, X, A, D — +3 each ⇒ G.
Hence NUEG — option (d).
Interchange − and × : the equation becomes 40 × 12 ÷ 3 − 2 + 6.
BODMAS: 40 × 12 = 480, then 480 ÷ 3 = 160.
160 − 2 + 6 = 164 ✓ — it matches the right-hand side.
Hence − and × — option (b).
C and D are husband and wife, and B is their son.
A is B’s daughter, i.e. one generation below B.
So A is the granddaughter of C and D.
Hence option (b).
The pattern is × n + 1 with n = 3, 4, 5, 6, 7.
6×3+1 = 19, 19×4+1 = 77, 77×5+1 = 386 ✓.
Next: 386 × 6 + 1 = 2317; check 2317 × 7 + 1 = 16220 ✓.
Hence 2317 — option (b).
Replace # with × : first × second = third.
4×3 = 12 ✓, 5×3 = 15 ✓, 5×4 = 20 ✓.
But 8×1 = 8, not 24 ✗.
Hence option (d).
SQUARE → TRVDSD: S+1 = T, Q+1 = R, U+1 = V, A+3 = D, R+1 = S, E−1 = D.
So the shifts by position are +1, +1, +1, +3, +1, −1.
CIRCLE: C+1 = D, I+1 = J, R+1 = S, C+3 = F, L+1 = M, E−1 = D.
Hence DJSFMD — option (b).
The humans mentioned are only SOME living beings — they need not overlap with the trees at all.
So I is not certain.
II is an even stronger universal claim, far beyond the data.
Hence Neither follows — option (d).
In MUTE, the 1st letter is M (13th) and the 4th letter is E (5th).
The midpoint of their positions = = 9.
The 9th letter of the alphabet is I.
Hence option (b).
Letters: C, E, G, I — each moves +2 ⇒ next is K.
Numbers: 2, 3, 4, 5 — each rises by 1 ⇒ next is 6.
So the next term is K6.
Hence option (b).
From HOUSE = 45271: H = 4, O = 5, U = 2, S = 7, E = 1.
From RAT = 986: R = 9, A = 8, T = 6.
SHORE = 7, 4, 5, 9, 1.
= 74591 — option (a).
Rule: a @ b = a² + b.
Check: 4² + 4 = 20 ✓; 2² + 3 = 7 ✓.
6 @ 4 = 36 + 4.
= 40 — option (b).
From CROW = H@3X: C = H, R = @, O = 3, W = X.
From WORF = X3@H: W = X, O = 3, R = @, F = H.
FOWR = F, O, W, R = H, 3, X, @.
= H3X@ — option (c).
Rule: (first × second) × 4.
Check: (4×4)×4 = 64 ✓; (6×6)×4 = 144 ✓.
8 $ 8 = (8×8) × 4 = 64 × 4.
= 256 — option (b).
Acid = × 80 = 60 L; water = × 80 = 20 L.
Acid stays fixed, so = .
20 + x = 60.
x = 40 L — option (c).
X − Y means X is the brother of Y.
Y + Z means Y is the mother of Z.
So X is the brother of Z’s mother — that is Z’s maternal uncle.
Hence option (b).
Girls = 60 × = 36.
If 75% passed, then 25% failed.
Failed girls = 36 × .
= 9 — option (a).