Odd One Out (Varieties Questions)

Total Questions: 29

1. 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? [S.S.C CHSL Tier II (10/01/2024)]

NOTE: (Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g., 13 – Operations on 13 such as adding / subtracting / multiplying etc., to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

Correct Answer: (c) 524 - 260
Solution:(1st number) ÷ 2 = 2nd number

(364, 182) → 364 ÷ 2 = 182
(438, 219) → 438 ÷ 2 = 219
(986, 493) → 986 ÷ 2 = 493

But,
(524, 260) → 524 ÷ 2 = 262 (Not 260)

Hence, (524, 260) is the correct answer.

2. Three of the following letter-clusters are alike in same manner and one is different. Select the one that is different. [S.S.C CPO 03/10/2023 (3rd Shift)]

Correct Answer: (a) QJPK
Solution:The pattern followed here is :

But,

Hence, QJPK is the correct answer.

3. Select the word-pair that does NOT represent a similar relationship to the one expressed in the pair of words given below. [S.S.C CHSL 17/08/2023 (3rd Shift)]

(The words must be considered as meaningful English words and must not be related to each other based on the number of letters, consonants/vowels in the word.)

Absence : Existence

Correct Answer: (d) Careful : Cautious
Solution:All the given options are Antonym to each other except the option (d), in which 'careful' and 'cautious' are synonyms to each other.

4. Three of the following number triads are alike in some manner and one is different. Select the odd number triad. [S.S.C CHSL 14/08/2023 (2nd 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.)

Correct Answer: (b) 8 : 56 : 3100
Solution:The pattern followed here is :

(1st number) × 7 = 2nd number,  (2nd number) × 7 = 3rd number
(3 : 21 : 147) → (3 × 7 = 21), (21 × 7 = 147)
(1 : 7 : 49) → (1 × 7 = 7), (7 × 7 = 49)
(10 : 70 : 490) → (10 × 7 = 70), (70 × 7 = 490)
But,

(8 : 56 : 3100) → (8 × 7 = 56), (56 × 7 ≠ 3100)

Hence, (8 : 56 : 3100) is the correct answer.

5. Based on the 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? [S.S.C CHSL 10/08/2023 (2nd Shift)]

Correct Answer: (a) CYF
Solution:The pattern followed here is :

But,

Hence, CYF is the correct answer.

6. 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. [S.S.C CHSL 07/08/2023 (2nd Shift)]

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

15 : 126, 27 : 234, 31 : 270, 17 : 162

Correct Answer: (a) 17 : 162
Solution:The pattern followed here is :

(1st number × 9) − 9 = 2nd number
(15 : 126) → (15 × 9) − 9 = 126
(27 : 234) → (27 × 9) − 9 = 234
(31 : 270) → (31 × 9) − 9 = 270
But,

(17 : 162) → (17 × 9) − 9  = 144 (Not 162)

Hence, (17 : 162) is the correct answer

7. Three of the following number pairs are alike in some manner and one is different. Select the odd number pair. [S.S.C CHSL 03/08/2023 (3rd Shift)]

Note: (The second number in the given number pairs is formed by performing a certain operation on the first number. The same operation is followed in all the number pairs except one. Find that odd number pair.)

Correct Answer: (b) 80 : 13
Solution:The logic followed here is :

(2nd number × 5) + 5 = 1st number
(55 : 10) → (10 × 5) + 5 = 55
(20 : 3) → (3 × 5) + 5 = 20
(95 : 18) → (18 × 5) + 5 = 95
But,

(80 : 13) → (13 × 5) + 5 = 70 (Not 80)

Hence, (80 : 13) is the correct answer.

8. Find the odd number pair. [S.S.C CGL 27/07/2023 (2nd shift)]

Correct Answer: (c) (5, 100)
Solution:The pattern followed here is :

(1st number)² × (1st number − 3) = 2nd number
(8, 320) → 8² × (8 − 3) ⇒ 64 × 5 = 320
(11, 968) → 11² × (11 − 3) ⇒ 121 × 8 = 968
(6, 108) → 6² × (6 − 3) ⇒ 36 × 3 = 108
But,

(5, 100) → 5² × (5 − 3) ⇒ 25 × 2 = 50 (Not 100)

9. Find the odd number pair. [S.S.C CGL 20/07/2023 (4th shift)]

Correct Answer: (d) 5 : 10 : 126
Solution:The pattern followed here is :

(1st number) × (2nd number ÷ 2)² − 1 = 3rd number
(9 : 18 : 728) → {9 × (18 ÷ 2)²} − 1 ⇒ (9 × 81) − 1 ⇒ 729 − 1 = 728
(6 : 12 : 215) → {6 × (12 ÷ 2)²} − 1 ⇒ (6 × 36) − 1 ⇒ 216 − 1 = 215
(2 : 4 : 7) → {2 × (4 ÷ 2)²} − 1 ⇒ (2 × 4) − 1 ⇒ 8 − 1 = 7
But,

(5 : 10 : 126) → {5 × (10 ÷ 2)²} − 1 ⇒ (5 × 25) − 1 ⇒ 125 − 1 = 124(Not 126)

Hence, (5 : 10 : 126) is the correct answer.

10. Find that odd number pair. [S.S.C CGL 19/07/2023 (4th shift)]

Correct Answer: (d) (8, 20)
Solution:The logic here is :

(125, 91) → (5³, 5 × (5 + 1) × 3 + 1)

(64, 61) → (4³, 4 × (4 + 1) × 3 + 1)

(27, 37) → (3³, 3 × (3 + 1) × 3 + 1)

But,

(8, 20) → (2³, 2 × (2 + 1) × 3 + 1) → (8, 19) ≠ (8, 20)

Hence, (8, 20) is the correct answer.