The “Top 30 Logical Reasoning and Mental Ability MCQs for OSSC CGL” is designed to help candidates prepare effectively for the Odisha Staff Selection Commission’s Combined Graduate Level examination. These multiple-choice questions encompass various aspects of logical reasoning and mental ability, including puzzles, syllogisms, coding-decoding, series, analogies, and data interpretation. Each question is meticulously crafted to challenge the candidates’ analytical and critical thinking skills, ensuring they are well-prepared for the logical reasoning section of the OSSC CGL exam. The solutions provided offer clear and concise explanations to enhance understanding and aid in effective learning.
Top 30 Logical Reasoning MCQs For OSSC CGL 01 October 2024
Q1. Find the odd pair of letters from the given alternatives.
(a) Dollar
(b)Rupees
(c)Pound
(d)Gram
S1. Ans. (d)
Sol: All except Gram are names of currencies, while Gram is a unit of weight.
Q2. A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
81, 64, 100, 125, 121, ?
(a)169
(b)216
(c)289
(d)225
S2. Ans. (b)
Sol: The pattern followed is :
92 = 81
43 = 64
102 =100
53 = 125
112 = 121
The next term will be 63 = 216.
Q3. There will be a certain relationship between the first two numbers. We have to find that and accordingly solve the question.
81: 729 :: 49 : ?
(a) 313
(b) 379
(c) 343
(d) 330
S3. Ans. (c)
Sol: Here relationship is 92 : 93 :: 72: 73
Q4. Find the odd one out from the given options.
(a) Arctic
(b) Atlantic
(c) Indian
(d) Greenland
S4. Ans. (d)
Sol: a, b and c are oceans.
Q5. Choose the odd word from the given words.
(a)Leg
(b)Hand
(c) Brain
(d)Ear
S5. Ans. (c) Brain
Sol: Except Brain, All are external body organs
Q6. A series is given with one term missing term. Choose the correct alternative
B,E,H,K,N,?
(a)Q
(b)M
(c)N
(d)W
S6. Ans. (a)
Sol: Pattern follows,
B + 3 = E
E + 3 = H
H + 3 = K
K + 3 = N
N + 3 = Q
Q7. If R = 18 , N = 14 and BALL = 27, Then value of GO is
(a) 20
(b) 22
(c) 44
(d) 40
S7. Ans. (b)
Sol: In alphabetical series,
The following pattern is the sum of the place values of the alphabets.
BALL = (2 + 1 + 12 + 12) = 27
GO = 7 + 15 = 22
Hence, the code for GO is 22.
Q8. 45 girls are sitting in a row. If Radha is sitting in the 21st position from the left end, then what is her position from the right end?
(a)20
(b)23
(c)25
(d)31
S8. Ans. (c)
Sol:
Total number of girls = Left position + Right position – 1
45= 21+ Right position – 1 = 46 – 21 = 25
Hence, Radha is sitting in the 25th position from the right end.
Q9. If 15 August is the third Monday, then what date will be three days after the third Tuesday of the same month?
(a) 27
(b)22
(c)23
(d)20
S9. Ans. (d)
Sol: If 15 August will be the third Monday then the third Tuesday must be 16 August.
Three days after the third Tuesday will be 20 August.
20 August.
Q10. Choose the odd one out.
(a)Fish
(b)Snake
(c)Crocodile
(d)Whale
S10. As. (d)
Sol: All except whales lay eggs.
Q11. Choose the correct option.
Coal : Black :: Limestone :: ?
(a)Red
(b)Blue
(c)White
(d)Green
S11. Ans. (c)
Sol: Coal is black in colour similarly limestone is white in colour.
Q12. Find out the missing number from the given responses.
| 21 | 24 | 36 |
| 11 | 14 | 12 |
| 3 | ? | 4 |
| 77 | 112 | 108 |
(a)2
(b)3
(c)4
(d)5
S12. Ans. (b)
Sol: 1st column: 21/3 × 11 = 77 , 3rd column: 36/4 × 12 = 108
2nd column: 24/x × 14 = 112
x = 3.
Q13. Find out the missing letter from the given responses.
| B | H | N |
| D | J | P |
| G | M | ? |
(a)U
(b)V
(c)X
(d)S
S13. Ans. (d)
Sol:
1st column: B + 2 = D, D + 3 = G ,
2nd column: H + 2 = J, J + 3 = M ,
3rd column N + 2 = P, P + 3 = S.
Q14. Complete the code with the correct option from the following alternatives.
BOXER : 64 :: PLAYER : ?
(a)77
(b)78
(c)87
(d)97
S14. Ans. (a)
Sol: Sum of alphabetical numbers of letters
BOXER = (2 + 15 + 24 + 5 + 18) = 64
PLAYER = (16 + 12 + 1 + 25 + 5 + 18)= 77
Q15. Complete the number series.
1 ,9 , 25 , 49 , 81 , ?
(a)87
(b)100
(c)121
(d)125
S15. Ans. (c)
Sol: 12 , 32, 52, 72, 92 then 112.
Q16. A, P, R, X, S and Z are sitting in a row. S and Z are in the centre. A and P are at the ends. R is sitting to the left of A. Who is to the right of P?
(a)A
(b)X
(c) S
(d)Z
S16. Ans. (b)
Sol:
The seating arrangement is as follows: P X S Z R A
Therefore, the right of P is X.
Q17. Find out the wrong number in the series.
121 , 144 , 169 , 195 , 225 , 256
(a) 121
(b)195
(c)265
(d)225
S17. Ans. (b)
Sol: Each number is the consecutive square of 11 , 12 ,13 and so on,
But 142 =196 not 195
Q18. ELFA, GLHA, ILJA, _____, MLNA
(a) OLPA
(b) KLMA
(c) LLMA
(d) KLLA
S18. Ans. (d)
Sol: The second and fourth letters in the series, L and A, are static. The first and third letters consist of an alphabetical order beginning with the letter E.
Q19. Which pair does NOT belong to others?
(a) 7-49
(b)5-125
(c)11-121
(d)9-81
S19. Ans. (b)
Sol: All are numbers and their squares except option (b); which is a number and its cube
Q20. Select the option which shares a relationship as that shared by that given pair :
(12 20 4)
(a) (5 10 5)
(b) (13 18 5)
(c) (17 27 5)
(d)(20 15 25)
S20. Ans. (b)
Sol: The sum of the numbers is 36
12 + 20 + 4 = 36
13 + 18 + 5 = 36.
Q21. Look at this series: 22, 21, 23, 22, 24, 23, … What number should come next?
(a)22
(b)24
(c)25
(d)26
S21. Ans. (c)
Sol: Alternate subtraction and addition series; 1 is subtracted, then 2 is added, and so on.
Q22. choose the odd one out of the given alternatives:
(a)Handle
(b)Engine
(c)Wheel
(d)Bike
S22. Ans. (d)
Sol: Handle, Engine, and wheel are the parts of the Bike
Q23. If UNIVERSITY is 0976854321, how can TRUSTY be written in that code?
(a)250421
(b)254012
(c)248239
(d)258765
S23. Ans. (a)
Sol: U N I V E R S I T Y T R U S T Y
0 9 7 6 8 5 4 3 2 1 2 5 0 4 2 1
Q24. If the given letters are represented by the numeral below them,
R T S U V AB
8 5 2 0 6 7 9
Then 5760 =?
(a)SBAT
(b)TAVU
(c)RBUS
(d)TAUV
S24. Ans. (b)
Sol: R T S U V A B 5 7 6 0
8 5 2 0 6 7 9 T A V U
Q25. Select the one which is different from the other three?
(a)Mumbai
(b)Bangalore
(c)Chennai
(d)Ladakh
S25. Ans. (d)
Sol: Ladakh is a union territory, Rest are cities
Q26. Find out the wrong number in the following series.
3375 , 4913 , 5832 , 9261 , 12167
(a)3375
(b)12167
(c)5832
(d)9261
S26. Ans. (c)
Sol. Series follows a cube of consecutive odd numbers.
153, 173, 193, 213, 233…….. but 5832 is the cube of 18.
Direction: (Que 3- 5) Read the following and answer the following:
The sum of the income of A and B is more than that of C and D have together. The sum of the income of A and C is the same as that of B and D have taken together. Moreover. A earns half as much as the sum of the income of B and D.
Q27. Whose income is the highest?
(a)A
(b)C
(c)B
(d)D
S27. Ans. – (b)
Sol.
(A + B) > (C +D)……(i)
(A + C) = (B + D)……(ii)
2A = B + D…(.iii)
Putting (iii) in (ii) we get, A = C.
Since (A + B) > (C + D) and A = C so B > D.
Thus, from (iii), we get B > A and so B > C.
Q28. Which of the following statements is not correct?
(a) B earns more than D.
(b) C earns more than D
(c) A earns more than B
(d) B earns more than C.
S28. Ans. – (c)
Sol.
(A + B) > (C +D)……(i)
(A + C) = (B + D)……(ii)
2A = B + D…(.iii)
Putting (iii) in (ii) we get, A = C.
Since (A + B) > (C + D) and A = C so B > D.
Thus, from (iii), we get B > A and so B > C.
B earns more than A
Q29. If A’s income be Rs 80,000 per annum and the difference between the income
of B and D be the same as A’s income. B’s income is,
(a)Rs 80,000
(b)Rs 1,20,000
(c) Rs 60,000
(d) Rs 40.000
S29. Ans. – (b)
Sol.
(A + B) > (C +D)……(i)
(A + C) = (B + D)……(ii)
2A = B + D…(.iii)
Putting (iii) in (ii) we get, A = C.
Since (A + B) > (C + D) and A = C so B > D.
Thus, from (iii), we get B > A and so B > C.
(B + D = 2A ) ,(B – D = A) from these 2 equations we get 2B =2,40,000
B = 1,20,000.
Q30. Select the pair which is similarly related to the given pair:
Enough : Excess : : Sufficiency : ?
(a)Adequacy
(b)Surplus
(c)Competency
(d)Import
S30. Ans. (b)
Sol. Enough is related to Sufficiency similarly Excess is related to Surplus
