Practice Questions: Classification- 2 | Logical Reasoning for CLAT PDF Download

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) 133 – 98
(b) 150 – 115
(c) 182 – 140
(d) 188 – 153
Ans: (c)
In all other pairs, first number is 35 more than the second.
Hence, option C is correct.

Q2: Which Pair does NOT belong with the others?
(a) 22, 4, 5
(b) 34, 4, 8
(c) 37, 4, 9
(d) 54, 4, 13
Ans: (c)
From the options, we get
1st option: 22 = 2 + 20 = 5 × 4
2nd option: 34 = 32 + 2 = 8 × 4
4th option: 54 = 2 + 52 = 4 × 13
In all other groups, the first number is obtained by adding 2 to the product of the second and the third numbers.
But
3rd option: 37 = 1 + 36 = 4 × 9
Hence, third option is different & option C is correct.

Q3: Which Pair does NOT belong with the others?
(a) 12 – 42
(b) 14 – 82
(c) 23 – 64
(d) 36 – 72
Ans: (d)
In all other pairs, the sum of the digits of the second number is twice the sum of the digits of the first number.
Hence, option D is correct.

Q4: Which Pair does NOT belong with the others?
(a) 1, 4, 3, 8
(b) 2, 4, 3, 9
(c) 3, 2, 3, 8
(d) 5, 3, 2, 9
Ans: (d)
In all other groups, the sum of the first three numbers is equal to the fourth number.
Hence, option D is correct.

Q5: Which Pair does NOT belong with the others?
(a) 2, 3, 6
(b) 6, 1, 6
(c) 3, 3, 9
(d) 6, 2, 5
Ans: (d)
In all other groups, the third number is equal to the product of the first two numbers.
Hence, option D is correct.

Q6: Which Pair does NOT belong with the others?
(a) 3, 9, 27
(b) 5, 25, 125
(c) 7, 49, 343
(d) 9, 81, 529
Ans: (d)
All other groups consist of a number, its square and its cube.
Hence, option D is correct.

Q7: Which Pair does NOT belong with the others?
(a) 5, 10, 20, 15
(b) 10, 20, 40, 30
(c) 10, 20, 60, 45
(d) 15, 30, 60, 45
Ans: (c)
In all other groups, the numbers are in the ratio 1 : 2 : 4 : 3.
Hence, option C is correct.

Q8: Which Pair does NOT belong with the others?
(a) 3, 9, 6, 15
(b) 6, 18, 12, 30
(c) 4, 16, 12, 24
(d) 12, 36, 24, 60
Ans: (c)
In all other groups, the numbers are in the ratio 1 : 3 : 2 : 5.
Hence, option C is correct.

Q9: Which Pair does NOT belong with the others?
(a) 2, 3, 5, 7
(b) 17, 19, 23, 29
(c) 53, 59, 61, 67
(d) 37, 41, 43, 49
Ans: (d)
All other groups consist of four consecutive prime numbers.
Hence, option D is correct.

Q10: Select the one which is different from the other three responses.
(a) (1, 0)
(b) (2, 3)
(c) (3, 8)
(d) (4, 27)
Ans: (b)
In the number pair (2, 3) both the numbers are Prime Numbers.
Hence, option B is correct.