Odd One Out (SSC CHSL 2021 Tier – 1)

Reversed digits of 1^st number = 2^nd number

(2437 : 7342) → 2437 ↔ 7342

(3569 : 9653) → 3569 ↔ 9653

(1786 : 6871) → 1786 ↔ 6871

But,

(4328 : 8324) → 4328 ↔ 8234 ≠ 8324

Hence, (4328 : 8324) is the correct answer.

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

(3427 : 16) → (3 + 4 + 2 + 7)   = 16
(8671 : 22) → (8 + 6 + 7 + 1)   = 22
(9876 : 30) → (9 + 8 + 7 + 6)  = 30
But,

(2834 : 18) → (2 + 8 + 3 + 4)  = 17 ≠ 18

Hence, (2834 : 18) is the correct answer.

(Sum of digit of 1^st number) ÷ 3 = (2^nd number)

(678 : 7) = (6 + 7 + 8) ÷ 3 = 7
(366 : 5) = (3 + 6 + 6) ÷ 3 = 5
(546 : 5) = (5 + 4 + 6) ÷ 3 = 5
But,

(282 : 6) = (2 + 8 + 2) ÷ 3 = 4 ≠ 6

Hence, (282 : 6) is the correct answer.