Odd One Out (SSC CHSL 2023 Tier – 1) (Part

Total Questions: 30

21. Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group? [SSC CHSL 14/08/2023 (4th Shift)]

(1) 7 - 19
(2) 11 - 30
(3) 14 - 39
(4) 17 - 48

(a) 3
(b) 2
(c) 1
(d) 4

Correct Answer: (c) 1
Note:

Logic: (1st no. × 3) - 3 = 2nd no.
(11 × 3) - 3 = 30
(14 × 3) - 3 = 39
(17 × 3) - 3 = 48
But, (8 × 3) - 3 = 18 ≠ 19

22. The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair. [SSC CHSL 17/08/2023 (1st Shift)]

(NOTE: Operations should be performed on whole numbers, without breaking down the numbers into their constituent digits.)

(a) 32 : 99
(b) 42 : 123
(c) 24 : 75
(d) 64 : 195

Correct Answer: (b) 42 : 123
Note:

Logic: (1st num × 3) + 3 = 2nd num
32 : 99 → (32 × 3) + 3 = 96 + 3 = 99

24 : 75 → (24 × 3) + 3 = 72 + 3 = 75
64 : 195 → (64 × 3) + 3 = 192 + 3 = 195
But, 42 : 123 → (42 × 3) + 3 = 126 + 3 = 129 (Not 123)

23. The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair. [SSC CHSL 17/08/2023 (1st Shift)]

(a) 9 : 26
(b) 5 : 17
(c) 3 : 13
(d) 8 : 23

Correct Answer: (a) 9 : 26
Note:

Logic: (1st num × 2) + 7 = 2nd num
5 : 17 → (5 × 2) + 7 = 10 + 7 = 17
6 : 19 → (6 × 2) + 7 = 12 + 7 = 19
8 : 23 → (8 × 2) + 7 = 16 + 7 = 23
But, 9 : 26 → (9 × 2) + 7 = 18 + 7 = 25 (Not 26)

24. Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group? [SSC CHSL 17/08/2023 (1st Shift)]

(a) SRP
(b) JIG
(c) HGE
(d) FCB

Correct Answer: (d) FCB
Note:

25. The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair. [SSC CHSL 17/08/2023 (2nd Shift)]

(a) 4 : 36
(b) 2 : 10
(c) 5 : 55
(d) 3 : 23

Correct Answer: (d) 3 : 23
Note:

Logic: 2nd no. is the multiple of 1st no.
36 is the multiple of 4.
10 is the multiple of 2.
55 is the multiple of 5.
But, 23 is not the multiple of 3

26. The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair. [SSC CHSL 17/08/2023 (2nd Shift)]

(NOTE: Operations should be performed on whole numbers, without breaking down the numbers into their constituent digits.)

(a) 21 : 100
(b) 19 : 88
(c) 13 : 64
(d) 17 : 80

Correct Answer: (a) 21 : 100
Note:

Logic: (1st no. × 4) + 12 = 2nd no.
(19 × 4) + 12 = 76 + 12 = 88
(13 × 4) + 12 = 52 + 12 = 64
(17 × 4) + 12 = 68 + 12 = 80
But, (21 × 4) + 12 = 84 + 12 = 96 ≠ 100

27. Based on the alphabetical order, three of the following four options are alike in a certain way and thus form a group. Which is the option that does NOT belong to this group? [SSC CHSL 17/08/2023 (2nd Shift)]

(a) TSQ
(b) YWU
(c) FEC
(d) MLJ

Correct Answer: (b) YWU
Note:

28. Based on the alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which of the following does NOT belong to that group? [SSC CHSL 17/08/2023 (3rd Shift)]

(a) TVY
(b) QSV
(c) YAC
(d) CEH

Correct Answer: (c) YAC
Note:

29. Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group? [SSC CHSL 17/08/2023 (4th Shift)]

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits.)

(a) 2 - 6
(b) 4 - 20
(c) 5 - 30
(d) 8 - 75

Correct Answer: (d) 8 - 75
Note:

Logic:- (first number)² + first number = second number
In option (i) (2)² + 2 = 6
In option (ii) (4)² + 4 = 20
In option (iii) (5)² + 5 = 30
But, In option (iv) (8)² + 8 = 72 ≠ 75

30. The second number in the given number pairs is obtained by performing certain mathematical operations(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair. [SSC CHSL 17/08/2023 (4th Shift)]

(a) 5 : 20
(b) 4 : 12
(c) 7 : 42
(d) 6 : 36

Correct Answer: (d) 6 : 36
Note:

Logic :- (First number × (First number - 1)) = Second number
(5 : 20) : (5 × (5 - 1)) = 5 × 4 = 20
(6 : 20) : (4 × (4 - 1)) = 4 × 3 = 12
(7 : 42) : (7 × (7 - 1)) = 7 × 6 = 42
But,
(6 : 36) : (6 × (6 - 1)) = 6 × 5 ≠ 30 ≠ 36

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Odd One Out (SSC CHSL 2023 Tier – 1) (Part – II)