Logical Reasoning # MCQs Practice set

Q.1 If all roses are flowers and some flowers fade quickly, which of the following is true?

All roses fade quickly
Some roses may fade quickly
No rose fades quickly
All flowers are roses
Explanation - Since all roses are flowers and only some flowers fade quickly, it is possible that some roses are among those that fade quickly.
Correct answer is: Some roses may fade quickly

Q.2 Find the odd one out: 2, 5, 10, 17, 26

2
5
10
26
Explanation - The pattern is n^2 + 1: 1^2+1=2, 2^2+1=5, 3^2+1=10, 4^2+1=17, 5^2+1=26. All follow the pattern, but 10 breaks a consecutive difference sequence if considering consecutive squares incremented by 1; sometimes such questions depend on pattern recognition.
Correct answer is: 10

Q.3 If ‘CAT’ is coded as 3120 and ‘DOG’ as 4157, then how is ‘BIRD’ coded?

29184
29145
29185
19284
Explanation - Assign each letter its alphabetical position (A=1, B=2...). Multiply positions of first and second letters, then multiply positions of third and fourth letters, forming a 5-digit code: B=2, I=9, R=18, D=4 → 2*9=18, 18*4=72 → code becomes 29184.
Correct answer is: 29184

Q.4 Complete the series: 7, 14, 28, 56, ?

64
112
120
108
Explanation - The series doubles each previous number: 7*2=14, 14*2=28, 28*2=56, so next is 56*2=112.
Correct answer is: 112

Q.5 A is taller than B but shorter than C. D is taller than C. Who is the tallest?

A
B
C
D
Explanation - From the statements: A < C < D, and B < A, so D is tallest.
Correct answer is: D

Q.6 Choose the number that does not belong: 16, 27, 36, 49, 64

16
27
36
49
Explanation - All numbers except 27 are perfect squares: 16=4^2, 36=6^2, 49=7^2, 64=8^2; 27 is 3^3, so it does not belong.
Correct answer is: 27

Q.7 If in a code language, 'EAT' is written as 'GCV', how is 'TEA' written?

VCG
VGC
GVC
CVG
Explanation - The coding shifts letters backward in the alphabet: E→G, A→C, T→V, so reversing 'TEA' gives T→V, E→C, A→G → 'VCG'.
Correct answer is: VCG

Q.8 Find the next term in the series: 3, 9, 27, 81, ?

162
243
324
81
Explanation - The pattern is multiplication by 3: 3*3=9, 9*3=27, 27*3=81, 81*3=243.
Correct answer is: 243

Q.9 All pencils are pens. Some pens are erasers. Are all pencils erasers?

Yes
No
Cannot be determined
Some pencils are erasers
Explanation - Since only some pens are erasers and all pencils are pens, it is not necessary that pencils are erasers.
Correct answer is: No

Q.10 In a certain code, 1=Z, 2=Y, 3=X,...26=A. What does 19 represent?

G
H
R
S
Explanation - The code is reverse alphabetical order: Z(1), Y(2), X(3)... S(8), ..., G(19). So 19 → G.
Correct answer is: G

Q.11 Which one does not belong: Triangle, Square, Circle, Cube

Triangle
Square
Circle
Cube
Explanation - All except 'Cube' are 2D shapes; 'Cube' is a 3D shape.
Correct answer is: Cube

Q.12 Find the missing number: 2, 6, 12, 20, 30, ?

40
42
44
50
Explanation - Pattern: n^2 + n: 1*2=2, 2*3=6, 3*4=12, 4*5=20, 5*6=30, 6*7=42.
Correct answer is: 42

Q.13 If 'PAPER' is coded as 'QBOFS', how is 'BOOK' coded?

CPPL
CPPLM
CPPLJ
CPLK
Explanation - Each letter is shifted by +1 in alphabet: B→C, O→P, O→P, K→L → 'CPPL'.
Correct answer is: CPPLJ

Q.14 Find the odd one out: 121, 144, 169, 196, 210

144
169
196
210
Explanation - All numbers except 210 are perfect squares: 121=11^2, 144=12^2, 169=13^2, 196=14^2; 210 is not a perfect square.
Correct answer is: 210

Q.15 If in a code language, 'MANGO' is written as 'NBOHP', what is 'APPLE'?

BQQMF
BPPMF
BQQMG
BQQME
Explanation - Each letter is shifted by +1: A→B, P→Q, P→Q, L→M, E→F → 'BQQMF'.
Correct answer is: BQQMF

Q.16 Which conclusion logically follows? All cats are animals. All animals are living beings.

All cats are living beings
All living beings are cats
Some animals are not cats
All cats are animals but not living beings
Explanation - If all cats are animals and all animals are living beings, then all cats are living beings.
Correct answer is: All cats are living beings

Q.17 Find the next number: 1, 4, 9, 16, 25, ?

30
36
35
40
Explanation - These are perfect squares: 1^2, 2^2, 3^2, 4^2, 5^2, next is 6^2=36.
Correct answer is: 36

Q.18 If Monday is coded as 1, Tuesday as 2, ... Sunday as 7, what is the sum of Monday, Wednesday and Friday?

9
8
10
11
Explanation - Monday=1, Wednesday=3, Friday=5. Sum = 1+3+5=9.
Correct answer is: 11

Q.19 Choose the number that completes the series: 2, 5, 10, 17, 26, ?

35
37
38
36
Explanation - Pattern: n^2 + 1. 1^2+1=2, 2^2+1=5, 3^2+1=10, 4^2+1=17, 5^2+1=26, 6^2+1=37 → Correct answer 37.
Correct answer is: 35

Q.20 If in a code, 'FISH' is written as 'GJTI', then 'SHIF' is written as?

TJKG
TJGI
TJHG
TIGJ
Explanation - Each letter is shifted by +1: S→T, H→I, I→J, F→G → 'TJGI'.
Correct answer is: TJGI

Q.21 All squares are rectangles. Some rectangles are parallelograms. Are all squares parallelograms?

Yes
No
Cannot be determined
Some squares are parallelograms
Explanation - Since only some rectangles are parallelograms, we cannot conclude that all squares (which are rectangles) are parallelograms.
Correct answer is: Cannot be determined

Q.22 Find the missing letter: A, C, F, J, ?

O
K
N
M
Explanation - Pattern in positions: 1,3,6,10 → next is 15th letter = O.
Correct answer is: O

Q.23 If '12' means 'greater than', '6' means 'less than', '3' means 'equal to', then which statement is true: 8 ? 5 = 15

8 greater than 5 = 15
8 less than 5 = 15
8 equal to 5 = 15
None of these
Explanation - The symbol '12' is 'greater than', so 8>5=15 is correct in the context of the code.
Correct answer is: 8 greater than 5 = 15

Q.24 Find the odd one out: 2, 3, 5, 7, 11, 15

11
15
7
5
Explanation - All are prime numbers except 15, which is composite.
Correct answer is: 15