Odd One Out (SSC CHSL 2021 Tier – 1)

(2^nd number - 3)² = 1^st number

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

But,
(169 : 14) → (14 - 3)² ⇒ (11)² = 121 ≠ 169

Hence, (169 : 14) is the correct answer.

(1^st number × 2)² = 2^nd number

(16 : 1024) → (16 × 2)² ⇒ (32)² = 1024
(14 : 784) → (14 × 2)² ⇒ (28)² = 784
(12 : 576) → (12 × 2)² ⇒ (24)² = 576
But,

(18 : 1620) → (18 × 2)² ⇒ (36)² = 1296 ≠ 1620

Hence, (18 : 1620) is the correct answer.

{(1^st number )² - 20} = 2^nd number

(3 : 7) → {(3)² - 2} ⇒ (9 - 2) = 7
(15 : 223) → {(15)² - 2} ⇒ (225 - 2) = 223
(8 : 62) → {(8)² - 2} ⇒ (64 - 2) = 62
But,

(23 : 526) → {(23)² - 2} ⇒ (529 - 2) = 527 ≠ 526

Hence, (23 : 526) is the correct answer.

(2^nd number + 2)² = 2^nd number

(25 : 3) → (3 + 2)² ⇒ (5)² = 25
(64 : 6) → (6 + 2)² ⇒ (8)² = 64
(81 : 7) → (7 + 2)² ⇒ (9)² = 81

But,
(100 : 9) → (9 + 2)² ⇒ (11)² = 121 ≠ 100

Hence, (100 : 9) is the correct answer.

(1^st number) × (1^st number - 2) = 2^nd number

(24 : 528) → {(24) × (24 - 2)} ⇒ (24 × 22) = 528

(36 : 1224) → {(36) × (36 - 2)} ⇒ (36 × 34) = 1224

(68 : 4488) → {(68) × (68 - 2)} ⇒ (68 × 66) = 4488

But,

(47 : 2116) → {(47) × (47 - 2)} ⇒ (47 × 45) = 2115 ≠ 2116

Hence, (47 : 2116) is the correct answer.

{(1^st number × 7) ÷ 2} = 2^nd number

(48 : 168) → {(48 × 7) ÷ 2} ⇒ (336 ÷ 2) = 168

(52 : 182) → {(52 × 7) ÷ 2} ⇒ (364 ÷ 2) = 182

(26 : 91) → {(26 × 7) ÷ 2} ⇒ (182 ÷ 2) = 91

But,

(34 : 114) → {(34 × 7) ÷ 2} ⇒ (238 ÷ 2) = 119 ≠ 114

Hence, (34 : 114) is the correct answer.

Sum of digit of 1^st number = 2^nd number

(537 : 15) → 5 + 3 + 7 = 15

(917 : 17) → 9 + 1 + 7 → 17

(673 : 16) → 6 + 7 + 3 = 16

But,

(459 : 19) → 4 + 5 + 9 = 18 ≠ 19

Hence, (459 : 19) is the correct answer.

(1^st number × 9) = 2^nd number

(441 : 49) → (49 × 9) = 441

(729 : 81) → (81 × 9) = 729

(369 : 41) → (41 × 9) = 369

But,

(343 : 47) → (47 × 9) = 423 ≠ 343

Hence, (343 : 47) is the correct answer.

{√(1^st number) + 3} = 2^nd number

(4 : 5) → (√4 + 3) ⇒ (2 + 3) = 5

(9 : 6) → (√9 + 3) ⇒ (3 + 3) = 6

(36 : 9) → (√36 + 3) ⇒ (6 + 3) = 9

But,

(16 : 8) → (√16 + 3) ⇒ (4 + 3) = 7 ≠ 8

Hence, (16 : 8) is the correct answer.

(1^st number + 1)² = 2^nd number

(53 : 2916) → (53 + 1)² ⇒ (54)² = 2916

(23 : 576) → (23 + 1)² ⇒ (24)² = 576

(19 : 400) → (19 + 1)² ⇒ (20)² = 400

But,

(41 : 1765) → (41 + 1)² ⇒ (42)² = 1764

Hence, (41 : 1765) is the correct answer.