Odd One Out (SSC CHSL 2021 Tier – 1)

Total Questions: 33

1. Find that odd number-pair. [SSC CHSL 24/05/2022 (Afternoon)]

Correct Answer: (a) 169 : 14
Solution:(n - 3)² : n

(14 - 3)² : 14 = (13)² : 14 = 169 : 14
(18 - 3)² : 18 = (15)² : 18 = 225 : 18
(17 - 3)² : 17 = (14)² : 17 = 196 : 17
(19 - 3)² : 19 = (16)² : 19 = 256 : 19

Clearly, we can see that 169 : 14 is an odd one.

2. Find that odd number pair. [SSC CHSL 24/05/2022 (Evening)]

Correct Answer: (c) 18 : 1620
Solution:Logic : n : (n × 2)²

In 16 : 1024, 16 : (16 × 2)² = 16 : 32² = 16 : 1024
In 14 : 784, 14 : (14 × 2)² = 14 : 28² = 14 : 784
In 18 : 1620, 18 : (18 × 2)² = 18 : 36² = 18 : 1620
In 12 : 576, 12 : (12 × 2)² = 12 : 24² = 12 : 576

we can see that (18 : 1620) is an odd one.

3. Find that odd number pair. [SSC CHSL 25/05/2022 (Evening)]

Correct Answer: (d) 23 : 123
Solution:Logic:- (a² - 1) : (a³ - 1)

(a) 3 : 7 = (2² - 1) : (2³ - 1)
(b) 15 : 63 = (4² - 1) : (4³ - 1)
(c) 8 : 26 = (3² - 1) : (3³ - 1)
(d) 23 : 123 = (5² - 2) : (5³ - 2)

Option (d) doesn’t follow this pattern.

4. Find that odd number pair. [SSC CHSL 26/05/2022 (Evening)]

Correct Answer: (c) 100 : 9
Solution:Logic : (n + 2)² : n

In 25 : 3, (3 + 2)² : 3 = (5)² : 3 = 25 : 3
In 64 : 6, (6 + 2)² : 6 = (8)² : 6 = 64 : 6
In 100 : 9,
(9 + 2)² : 9 = (11)² : 9 = 121 : 9 ≠ 100 : 9
In 81 : 7, (7 + 2)² : 7 = (9)² : 7 = 81 : 7

we can see that 100 : 9 is an odd one.

5. Find that odd number pair. [SSC CHSL 27/05/2022 (Morning)]

Correct Answer: (a) 47 : 2116
Solution:Logic : a : a × (a - 2)

By checking option, we get in option (a),
47 : 47 × 45 → 47 : 2115 ≠ 2116
Except (47 : 2116), all other options are following the same pattern.

6. Find that odd number pair. [SSC CHSL 27/05/2022 (Morning)]

Correct Answer: (d) 34 : 114
Solution:In 48 : 168, 48 : 48 × 7/2 → 48 : 168

In 52 : 182, 52 : 52 × 7/2 → 52 : 182

In 26 : 91, 26 : 26 × 7/2 → 26 : 91

In 34 : 118,

34 : 34 × 7/2 = 34 : 119 ≠ 34 : 118

we can see that (34 : 118) is an odd one.

7. Find that odd number pair. [SSC CHSL 27/05/2022 (Evening)]

Correct Answer: (c) 459 : 19
Solution:Logic : (abc : a+b+c)

In 537 : 15, 537 → 5 + 3 + 7 → 15

In 917 : 17, 917 → 9 + 1 + 7 → 17

In 459 : 19, 459 → 4 + 5 + 9 = 18 ≠ 19

In 673 : 16, 673 → 6 + 7 + 3 = 16

Clearly, we can see that 459 : 19 is an odd one.

8. Find that odd number pair. [SSC CHSL 30/05/2022 (Morning)]

Correct Answer: (d) 343 : 47
Solution:In 441 : 49, 49 × 9 : 49 = 441 : 9

In 729 : 81, 81 × 9 : 81 = 729 : 81

In 369 : 41, 41 × 9 : 41 = 369 : 41

343 : 47, 47 × 9 : 47 = 423 : 47 ≠ 343 : 47

Clearly, we can see that 343 : 47 is an odd one.

9. Find that odd number pair. [SSC CHSL 30/05/2022 (Evening)]

Correct Answer: (a) 16 : 8
Solution:In 16 : 8, √16 + 4 = 4 + 4 = 8

In 4 : 5, √4 + 3 = 2 + 3 = 5

In 9 : 6, √9 + 3 = 3 + 3 = 6

In 36 : 9, √36 + 3 = 6 + 3 = 9

So, we can clearly see that (16 : 8) is an odd one.

10. Find that odd number pair. [SSC CHSL 30/05/2022 (Evening)]

Correct Answer: (b) 41 : 1765
Solution: Logic : n : (n + 1)²

In 53 : 2916, 53 : (53 + 1)² = 53 : 54² = 53 : 2916

In 41 : 1765, 41 : (41 + 1)² = 41 : 42² = 41 : 1764 ≠ 41 : 1765

In 23 : 576, 23 : (23 + 1)² = 23 : 24² = 23 : 576

In 19 : 400, 19 : (19 + 1)² = 19 : 20² = 19 : 400

we can see that (41 : 1765) is an odd one.