Practice Questions: Classification- 4 | Logical Reasoning for CLAT PDF Download

Directions: In this type of questions, certain numbers are given, out of which all except one share some common property and hence are alike, while one is different and this number is to be chosen as the answer.

Q1: Choose the number which is DIFFERENT from the rest?
(a) 28
(b) 45
(c) 72
(d) 81
Ans: (a)
In all other numbers, the sum of the digits is 9.
Hence, option (a) is correct.

Q2: Choose the number which is DIFFERENT from the rest?
(a) 246
(b) 356
(c) 527
(d) 639
Ans: (b)
In all other numbers, the sum of the first two digits is equal to the third digit.
Hence, option (b) is correct.

Q3: Choose the number which is DIFFERENT from the rest?
(a) 49
(b) 63
(c) 77
(d) 81
Ans: (d)
Each of the numbers except 81 is divisible by 7.
Hence, option (d) is correct.

Q4: Choose the number which is DIFFERENT from the rest?
(a) 140
(b) 240
(c) 360
(d) 480
Ans: (a)
Each of the numbers except 140 is a multiple of 120.
Hence, option (a) is correct.

Q5: Choose the number which is DIFFERENT from the rest?
(a) 21
(b) 69
(c) 81
(d) 83
Ans: (c)
81 is the only perfect square number in the group.
Hence, option (c) is correct.

Q6: Choose the number which is DIFFERENT from the rest?
(a) 6895
(b) 6958
(c) 7948
(d) 9783
Ans: (d)
In all other numbers, the sum of the digits is 28.
Hence, option (d) is correct.

Q7: Choose the number which is DIFFERENT from the rest?
(a) 150
(b) 175
(c) 200
(d) 250
Ans: (b)
Each of the numbers except 175 is an even multiple of 25.
Hence, option (b) is correct.

Q8: Choose the number which is DIFFERENT from the rest?
(a) 119
(b) 136
(c) 147
(d) 153
Ans: (a)
Only 119 has different factors, 7 and 17, and no factor is repeated.
Hence, option (a) is correct.

Q9: Choose the number which is DIFFERENT from the rest?
(a) 37
(b) 49
(c) 132
(d) 154
Ans: (a)
37 is the only prime number in the group.
Hence, option (a) is correct.

Q10: Choose the number which is DIFFERENT from the rest?
(a) 232
(b) 431
(c) 612
(d) 813
Ans: (d)
In all other numbers, the product of the digits is 12.
Hence, option (d) is correct.

Directions: In this type of questions, certain pairs/groups of numbers are given out of which all except one are similar in some manner while one is different. The numbers in these similar pairs/groups may have the same property or may be related to each other according to the same rule. The candidate is required to choose the odd pair/group.

Q1: Which Pair does NOT belong with the others?
(a) 7 : 26
(b) 8 : 30
(c) 10 : 35
(d) 13 : 44
Ans: (b)
In all other pairs, 2nd number = (1st number × 3) + 5.
Hence, option B is correct.

Q2: Choose the number which is different from the rest?
(a) 8 – 27
(b) 125 – 216
(c) 343 – 512
(d) 1009 – 1331
Ans: (d)
All other pairs contain cubes of two successive natural numbers e.g., 8 = 2³ and 27 = 3³.
Hence, option D is correct.

Q3: Which Pair does NOT belong with the others?
(a) (18, 45)
(b) (23, 14)
(c) (29, 82)
(d) (36, 27)
Ans: (c)
In all other pairs, the difference between the two numbers is a multiple of 9.
Hence, option C is correct.

Q4: Which Pair does NOT belong with the others?
(a) 18 : 108
(b) 23 : 138
(c) 20 : 80
(d) 26 : 156
Ans: (c)
In all other pairs, the second number is 6 times the first.
Hence, option C is correct.

Q5: Which Pair does NOT belong with the others?
(a) 15 : 46
(b) 12 : 37
(c) 9 : 28
(d) 8 : 33
Ans: (d)
In all other pairs, 2nd number = (1st number × 3) + 1.
Hence, option D is correct.

Q6: Which Pair does NOT belong with the others?
(a) 15 : 63
(b) 22 : 91
(c) 23 : 95
(d) 31 : 97
Ans: (d)
In all other pairs, 2nd number = (1st number × 4) + 3.
Hence, option D is correct.

Q7: Which Pair does NOT belong with the others?
(a) 21 – 49
(b) 24 – 64
(c) 25 – 54
(d) 81 – 36
Ans: (c)
This is the only pair in which the two numbers have no common factor.
Hence, option C is correct.

Q8: Which Pair does NOT belong with the others?
(a) 3, 5
(b) 6, 2
(c) 1, 7
(d) 7, 3
Ans: (d)
In all other pairs, the sum of the two numbers is 8.
Hence, option D is correct.

Q9: Which Pair does NOT belong with the others?
(a) 16 – 18
(b) 56 – 63
(c) 96 – 108
(d) 86 – 99
Ans: (d)
In all other pairs, the ratio of the two numbers is 8 : 9.
Hence, option D is correct.

Q10: Which Pair does NOT belong with the others?
(a) (52, 142)
(b) (54, 126)
(c) (56, 168)
(d) (58, 184)
Ans: (c)
In all other pairs, the sum of the digits of both the numbers is the same.
Hence, option C is correct.

Directions: In this type of questions, certain numbers are given, out of which all except one share some common property and hence are alike, while one is different and this number is to be chosen as the answer.

Q1: Choose the number which is DIFFERENT from the rest?
(a) 7851
(b) 6432
(c) 5789
(d) 1325
Ans: (b)
Each of the numbers except 6432 is an odd number.
Hence, option B is correct.

Q2: Choose the number which is DIFFERENT from the rest?
(a) 372164
(b) 376821
(c) 318951
(d) 319446
Ans: (a)
Sum of the digits in each other number is 27.
Hence, option A is correct.

Q3: Choose the number which is DIFFERENT from the rest?
(a) 121
(b) 137
(c) 153
(d) 177
Ans: (a)
121 is the only perfect square number in the group.
Hence, option A is correct.

Q4: Choose the number which is DIFFERENT from the rest?
(a) 27
(b) 64
(c) 125
(d) 144
Ans: (d)
Each of the numbers except 144 is a perfect cube.
Hence, option D is correct.

Q5: Choose the number which is DIFFERENT from the rest?
(a) 11
(b) 13
(c) 15
(d) 17
Ans: (c)
Each of the numbers except 15 is a prime number.
Hence, option C is correct.

Q6: Choose the number which is DIFFERENT from the rest?
(a) 1236
(b) 2346
(c) 4566
(d) 5686
Ans: (d)
In all other numbers, the first three digits are consecutive numerals.
Hence, option D is correct.

Q7: Choose the number which is DIFFERENT from the rest?
(a) 10
(b) 11
(c) 15
(d) 16
Ans: (b)
11 is the only prime number in the group.
Hence, option B is correct.

Q8: Choose the number which is DIFFERENT from the rest?
(a) 7
(b) 15
(c) 31
(d) 57
Ans: (d)
All other numbers can be expressed as a power of 2 minus one. Thus, 7 = 2³ – 1, 15 = 2⁴ – 1, 31 = 2⁵ – 1.
Hence, option D is correct.

Q9: Choose the number which is DIFFERENT from the rest?
(a) 144
(b) 168
(c) 196
(d) 256
Ans: (b)
Each of the numbers except 168 is a perfect square.
Hence, option B is correct.

Q10: Choose the number which is DIFFERENT from the rest?
(a) 2
(b) 16
(c) 56
(d) 128
Ans: (c)
Each of the numbers except 56 can be expressed in terms of powers of 2.
Hence, option C is correct.