SSC CGL 18 September 2025 · Shift 2 · General Intelligence & Reasoning — questions with answers · ShikshaSphere
Chapter 77 of 192
18 September 2025 · Shift 2
General Intelligence & Reasoning
25 questions ~25 min readFree
25 questions
A
1
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
SCX, UEV, WGT, YIR, ?
A.BUS
B.ZVU
C.KJO
D.AKP
Solution
Letter series (+2, +2, −2)
1st letters: S, U, W, Y — +2 each ⇒ next is A (cyclic).
2nd letters: C, E, G, I — +2 each ⇒ next is K.
3rd letters: X, V, T, R — −2 each ⇒ next is P.
Hence AKP — option (d).
2
Choose the address that is the same as the one given below.
Flat No. 99D, Ajanta Towers, Patel Road, Prayagraj, Rajasthan - 977301
Address matching
Everything up to the city is identical in all four options.
Only the state name differs: Ladakh, Madhya Pradesh and Karnataka in (a), (b) and (c).
Option (d) alone keeps Rajasthan as given.
Hence option (d).
3
Choose the address that is the same as the one given below.
Sample Address: X420, Monarch Towers, Mattancherry, Kochi, Kerala 682200
A.X420, Monarc Towers, Mattancherry, Kochi, Kerala 682200
B.X420, Monarch Towers, Mattancherry, Kochi, Kerala 682200
C.X420, Monarch Towers, Matanchery, Kochi, Kerala 682200
D.X420, Monarch Towers, Mattancherry, cochi, Kerala 682200
Solution
Address matching
(a) drops the h in 'Monarch'; (c) misspells 'Matanchery'.
(d) writes 'cochi' instead of 'Kochi'.
Only (b) matches the sample exactly.
Hence option (b).
4
Consider the following statement and choose the option that follows.Statement: The Municipal Corporation of the city has decided to replace all old street lights installed on the roads with LED lights.
Assumptions:
I. LED lights will save more energy compared to old bulbs.
II. The Municipal Corporation wants to enhance the city’s beauty.
A.Only I is implicit
B.Only II is implicit
C.Both are implicit
D.Neither is implicit
Solution
Statement — assumptions
Old bulbs are replaced by LEDs mainly because LEDs consume far less power — I is implicit.
Nothing in the statement hints at beautification as the motive — II is not implicit.
A civic body changes lights for efficiency and cost, not decoration.
Hence Only I — option (a).
5
Consider the following statements and choose the option that follows.Statements:
I. The city administration has installed new sensors to monitor air quality in the city.
II. The pollution level has increased in the last few months.
A.I is the cause and II is the effect.
B.II is the cause and I is the effect.
C.Both are unrelated.
D.No relation.
Solution
Cause and effect
Rising pollution comes first and prompts the administration to act.
Installing sensors is the response to that rise.
So II is the cause and I is the effect.
Hence option (b).
6
Find the WRONG term in the given series.
6, 11, 18, 27, 36, 51
A.51
B.18
C.36
D.6
Solution
Wrong term in series
Differences: 11 − 6 = 5, 18 − 11 = 7, 27 − 18 = 9.
The gaps are consecutive odd numbers, so the next gap should be 11.
27 + 11 = 38, but the series shows 36 (and 38 + 13 = 51 ✓).
So 36 is the wrong term — option (c).
7
Replace the special characters with mathematical signs as given in the options to make a meaningful equation.
96 $ 3 % 4 = 28
Which two signs should be swapped to correct the following?
9 − 6 + 4 ÷ 84 × 6 = 59
A.− and +
B.× and −
C.× and +
D.÷ and ×
Solution
Swap signs
Swap ÷ and × : the equation becomes 9 − 6 + 4 × 84 ÷ 6.
84 ÷ 6 = 14, then 4 × 14 = 56.
9 − 6 + 56 = 59 ✓ — it matches the right-hand side.
Hence ÷ and × — option (d).
9
By interchanging the signs "−" and "×", which of the following equations will be NOT correct?
I. 22 × 4 − 35 ÷ 5 + 8 = 2
II. 12 + 16 × 18 ÷ 6 − 8 = 28
A.Only I
B.Only II
C.Both I and II
D.Neither I nor II
Solution
Interchange − and ×
After swapping, I becomes 22 − 4 × 35 ÷ 5 + 8 = 22 − 28 + 8 = 2 ✓ — correct.
II becomes 12 + 16 − 18 ÷ 6 × 8 = 12 + 16 − 24 = 4.
That is not 28 ✗.
So only II is not correct — option (b).
10
In a family, there are 6 members A, B, C, D, E and F.
A and B are a married couple.
C is the son of A.
E is the sister of C.
B is the mother of D.
F is the brother of A.
Who is the sister of D?
A.E
B.B
C.F
D.C
Solution
Family — sister of D
A and B are the parents; C, D and E are their children.
E is the sister of C, so E is a daughter of A and B.
D, being their child too, has E as his sister.
Hence option (a).
11
What comes at the place of the question mark?
3, 7, 13, 21, 31, ?
A.52
B.56
C.43
D.48
Solution
Series — even gaps
Differences: 4, 6, 8, 10 — rising by 2 each time.
The next difference is 12.
31 + 12 = 43.
Hence option (c).
12
Read the following statement carefully and identify the conclusion that follows.Statement: The library will remain closed on Sunday due to renovation.
Conclusions:
I. The renovation is planned for Sunday.
II. People cannot use the library this Sunday.
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
The closure is FOR renovation on Sunday, so the work is planned for that day — I follows.
If the library is closed, readers obviously cannot use it that day — II follows.
Both are direct consequences of the statement.
Hence Both — option (c).
13
Read the following statement carefully and draw conclusions.Statement: Due to the rise in gold prices in the international market, jewellery prices in the country have increased.
Conclusions:
I. Gold prices are influenced by the international market.
II. Jewellery traders in the country are increasing prices deliberately.
A.Neither I nor II follows
B.Only conclusion II follows
C.Both I and II follow
D.Only conclusion I follows
Solution
Statement — conclusions
The statement directly links the international rise to the domestic increase — I follows.
II accuses traders of deliberate profiteering, which the statement never suggests.
The rise is explained by the world market, not by intent.
Hence Only I — option (d).
14
Find the option that best completes the analogy.
HT : BD :: IR : ?
A.CB
B.DD
C.BC
D.YX
Solution
Opposite letters
Use place values: H(8) → B(2) means −6, and T(20) → D(4) means −16.
So the first letter moves back 6 places and the second moves back 16.
I(9) − 6 = C(3) and R(18) − 16 = B(2).
Hence CB — option (a).
15
If "RUSSIA" is written as "AISSUR", what is "BHUTAN" written as?
A.NATUBH
B.NABUHT
C.NATUHB
D.NABUTH
Solution
Word reversal
RUSSIA written backwards gives AISSUR — the letters are simply reversed.
Reverse BHUTAN letter by letter: N, A, T, U, H, B.
That is NATUHB.
Hence option (c).
16
What comes next?
ONM, NML, MLK, LKJ, ?
A.JKI
B.KJI
C.KIH
D.IJK
Solution
Letter series (−1)
Each cluster has three consecutive letters written backwards, and every cluster moves one step back.
O, N, M, L → next starting letter is K.
So the cluster is K, J, I.
Hence KJI — option (b).
17
Find the odd one out from the given alternatives:
A.Solar energy
B.Wind energy
C.Hydropower
D.Coal energy
Solution
Renewable vs non-renewable
Solar, wind and hydropower are all RENEWABLE sources of energy.
Coal is a fossil fuel — a non-renewable source.
So it belongs to a different category.
Hence option (d).
18
In a certain code language, Greek letters are used to represent English letters consistently. Using the provided code, decode the target sequence.
If φβλαξφβ is coded as NEPTUNE and βτραΠ is coded as EARTH,
Question: Then what does βΠαλα represent?
A.EHTPT
B.EUTPT
C.ERTPT
D.EATPT
Solution
Greek-letter code
From NEPTUNE = φβλαξφβ: φ = N, β = E, λ = P, α = T, ξ = U.
From EARTH = βτραΠ: τ = A, ρ = R, Π = H.
Now decode βΠαλα: β = E, Π = H, α = T, λ = P, α = T.
= EHTPT — option (a).
19
In a 60 L mixture, milk : water = 7 : 3. How much water must be added to make the ratio 3 : 2?
A.9 L
B.10 L
C.12 L
D.8 L
Solution
Mixture — add water
Milk = 60 × = 42 L; water = 60 × = 18 L.
Milk stays fixed, so = .
84 = 54 + 3x ⇒ 3x = 30.
x = 10 L — option (b).
20
Find the LCM of 14, 20 and 32.
A.2190
B.1180
C.1120
D.1220
Solution
LCM
Factorise: 14 = 2 × 7, 20 = 2² × 5, 32 = 2⁵.
LCM takes the highest power of each prime: 2⁵ × 5 × 7.
= 32 × 35.
= 1120 — option (c).
If Raziya's current age is three times her age 14 years ago, what will her age be one year from now?
A.22
B.30
C.32
D.42
Solution
Age problem
Let the present age be M: M = 3(M − 14).
M = 3M − 42 ⇒ 2M = 42 ⇒ M = 21.
One year later: 21 + 1.
= 22 years — option (a).
25
The series given below contains a sequence of numbers. Accordingly identify the incorrect number.
4, 5, 12, 39, 163
A.5
B.12
C.163
D.39
Solution
Wrong term in series
The rule is × n + n with n rising: 4×1+1 = 5, 5×2+2 = 12, 12×3+3 = 39 ✓.
The next term should be 39 × 4 + 4 = 160.
But the series shows 163.
So 163 is the incorrect term — option (c).
Finished reading? Now test yourself.
The same 25 questions, but with a timer and the answers hidden — 15 minutes.
1st letters: S, U, W, Y — +2 each ⇒ next is A (cyclic).
2nd letters: C, E, G, I — +2 each ⇒ next is K.
3rd letters: X, V, T, R — −2 each ⇒ next is P.
Hence AKP — option (d).
Differences: 11 − 6 = 5, 18 − 11 = 7, 27 − 18 = 9.
The gaps are consecutive odd numbers, so the next gap should be 11.
27 + 11 = 38, but the series shows 36 (and 38 + 13 = 51 ✓).
So 36 is the wrong term — option (c).
Test option (d): 96 ÷ 3 − 4.
96 ÷ 3 = 32.
32 − 4 = 28 = RHS ✓.
Hence ÷ and − — option (d).
Swap ÷ and × : the equation becomes 9 − 6 + 4 × 84 ÷ 6.
84 ÷ 6 = 14, then 4 × 14 = 56.
9 − 6 + 56 = 59 ✓ — it matches the right-hand side.
Hence ÷ and × — option (d).
After swapping, I becomes 22 − 4 × 35 ÷ 5 + 8 = 22 − 28 + 8 = 2 ✓ — correct.
II becomes 12 + 16 − 18 ÷ 6 × 8 = 12 + 16 − 24 = 4.
That is not 28 ✗.
So only II is not correct — option (b).
A and B are the parents; C, D and E are their children.
E is the sister of C, so E is a daughter of A and B.
D, being their child too, has E as his sister.
Hence option (a).
Differences: 4, 6, 8, 10 — rising by 2 each time.
The next difference is 12.
31 + 12 = 43.
Hence option (c).
Use place values: H(8) → B(2) means −6, and T(20) → D(4) means −16.
So the first letter moves back 6 places and the second moves back 16.
I(9) − 6 = C(3) and R(18) − 16 = B(2).
Hence CB — option (a).
RUSSIA written backwards gives AISSUR — the letters are simply reversed.
Reverse BHUTAN letter by letter: N, A, T, U, H, B.
That is NATUHB.
Hence option (c).
Each cluster has three consecutive letters written backwards, and every cluster moves one step back.
O, N, M, L → next starting letter is K.
So the cluster is K, J, I.
Hence KJI — option (b).
From NEPTUNE = φβλαξφβ: φ = N, β = E, λ = P, α = T, ξ = U.
From EARTH = βτραΠ: τ = A, ρ = R, Π = H.
Now decode βΠαλα: β = E, Π = H, α = T, λ = P, α = T.
= EHTPT — option (a).
Milk = 60 × = 42 L; water = 60 × = 18 L.
Milk stays fixed, so = .
84 = 54 + 3x ⇒ 3x = 30.
x = 10 L — option (b).
Factorise: 14 = 2 × 7, 20 = 2² × 5, 32 = 2⁵.
LCM takes the highest power of each prime: 2⁵ × 5 × 7.
= 32 × 35.
= 1120 — option (c).
Rule: (first × 10) + (second × 10).
Check: 130 + 30 = 160 ✓; 70 + 70 = 140 ✓.
6 # 4 = 60 + 40.
= 100 — option (b).
M, N and O are siblings.
Q is the mother of M, so Q is the mother of all three.
O, being male, is Q’s son.
Hence option (a).
Each term = previous × 2 + 3.
8×2+3 = 19, 19×2+3 = 41, 41×2+3 = 85 ✓.
Next: 85 × 2 + 3 = 173 (and 173 × 2 + 3 = 349 ✓).
Hence option (d).
Let the present age be M: M = 3(M − 14).
M = 3M − 42 ⇒ 2M = 42 ⇒ M = 21.
One year later: 21 + 1.
= 22 years — option (a).
The rule is × n + n with n rising: 4×1+1 = 5, 5×2+2 = 12, 12×3+3 = 39 ✓.
The next term should be 39 × 4 + 4 = 160.
But the series shows 163.
So 163 is the incorrect term — option (c).