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

Total Questions: 30

1. Three of the following number triads are alike in some manner and one is different. Select the odd number triad. [SSC CHSL 10/08/2023 (1st Shift)]

(NOTE: The second and third numbers in the given number triads are formed by performing a certain operation on the first number. The same operation is followed in all the number triads except one. Find that odd number triad.)

(a) 20 : 400 : 200
(b) 9 : 81 : 45
(c) 13 : 169 : 84.5
(d) 25 : 625 : 312.5

Correct Answer: (b) 9 : 81 : 45
Note:

Logic: (1st num)² = 2nd num and (2nd num ÷ 2) = 3rd num
20 : 400 : 200 → 20² = 400 and (400 ÷ 2) = 200
13 : 169 : 84.5 → 13² = 169 and (169 ÷ 2) = 84.5
25 : 625 : 312.5 → 25² = 625 and (625 ÷ 2) = 312.5
But, 9 : 81 : 45 → 9² = 81 and (81 ÷ 2) = 40.5 (Not 45)

2. 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 10/08/2023 (1st Shift)]

(a) RUY
(b) GJN
(c) BEI
(d) NQV

Correct Answer: (d) NQV
Note:

3. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different. [SSC CHSL 10/08/2023 (2nd Shift)]

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

37 : 152,
61 : 248,
39 : 160,
53 : 208

(a) 61 : 248
(b) 39 : 160
(c) 37 : 152
(d) 53 : 208

Correct Answer: (d) 53 : 208
Note:

Logic:
(1st number × 4) + 4 = 2nd number
(37: 152): (37 × 4) + 4 = 148 + 4 = 152
(61 : 248): (61 × 4) + 4 = 244 + 4 = 248
(39 : 160): (39 × 4) + 4 = 156 + 4 = 160
But, (53 : 208): (53 × 4) + 4 = 212 + 4 = 216 (Not 208)

4. 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 10/08/2023 (3rd Shift)]

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

(a) 18-37
(b) 33-67
(c) 29-59
(d) 27-53

Correct Answer: (d) 27-53
Note:

Logic: (1st no. × 2) + 1 = 2nd no.
(18 × 2) + 1 = 37
(33 × 2) + 1 = 67
(29 × 2) + 1 = 59
But, (27 × 2) + 1 = 55 (Not 53)

5. 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 10/08/2023 (3rd Shift)]

(a) ZAX
(b) KLI
(c) VWT
(d) IJH

Correct Answer: (d) IJH
Note:

6. 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 10/08/2023 (4th Shift)]

(a) 6 : 12
(b) 10 : 60
(c) 8 : 40
(d) 7 : 21

Correct Answer: (c) 8 : 40
Note:

Logic: - (1st number) × (1st number - 4) = 2nd number
6 : 12: (6 × (6 - 4)) = 6 × 2 = 12
10 : 60: (10 × (10 - 4)) = 10 × 6 = 60

7 : 21 : → (7) × (7 - 4) = (7) × (3) = 21
But, 8 : 40 : → (8) × (8 - 4) = (8) × (4) = 32 (Not 40)

7. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different. [SSC CHSL 11/08/2023 (1st Shift)]

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

63 : 137,
70 : 151,
47 : 83,
34 : 79

(a) 63 : 137
(b) 70 : 151
(c) 47 : 83
(d) 34 : 79

Correct Answer: (c) 47 : 83
Note:

Logic : (1st no. × 2) + 11 = 2nd no.
63 : 137 → (63 × 2) + 11 = 126 + 11 = 137
70 : 151 → (70 × 2) + 11 = 140 + 11 = 151
34 : 79 → (34 × 2) + 11 = 68 + 11 = 79
But, 47 : 83 → (47 × 2) + 11 = 94 + 11 = 105 (Not 83)

8. 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 11/08/2023 (1st Shift)]

(a) NOR
(b) LNP
(c) DEH
(d) LMP

Correct Answer: (b) LNP
Note:

9. Based on the English alphabetical order, 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 11/08/2023 (2nd Shift)]

(a) RPT
(b) YWA
(c) FDH
(d) EJN

Correct Answer: (d) EJN
Note:

10. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different. [SSC CHSL 11/08/2023 (2nd Shift)]

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

29 : 160, 31 : 138, 27 : 150, 21 : 120

(a) 31 : 138
(b) 21 : 120
(c) 27 : 150
(d) 29 : 160

Correct Answer: (a) 31 : 138
Note:

Logic : (1st num × 5) + 15 = (2nd num)
29 : 160 → (29 × 5) + 15 = 145 + 15 = 160
27 : 150 → (27 × 5) + 15 = 135 + 15 = 150
21 : 120 → (21 × 5) + 15 = 105 + 15 = 120
But, 31 : 138 → (31 × 5) + 15 = 155 + 15 = 170 (Not 138)

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

1. Three of the following number triads are alike in some manner and one is different. Select the odd number triad. [SSC CHSL 10/08/2023 (1st Shift)]

2. 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 10/08/2023 (1st Shift)]

3. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different. [SSC CHSL 10/08/2023 (2nd Shift)]

4. 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 10/08/2023 (3rd Shift)]

5. 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 10/08/2023 (3rd Shift)]

6. 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 10/08/2023 (4th Shift)]

7. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different. [SSC CHSL 11/08/2023 (1st Shift)]

8. 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 11/08/2023 (1st Shift)]

9. Based on the English alphabetical order, 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 11/08/2023 (2nd Shift)]

10. Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different. [SSC CHSL 11/08/2023 (2nd Shift)]

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