Coding – Decoding (SSC CGL 2020 Tier 1)

In PERMIT ⇒ (P + 6 = V), (E ↔ V), (R - 6 = L), (M ↔ N), (I + 6 = O), (T ↔ G) → VVLNOG
Following the same pattern INERTIA is coded as (I + 6 = O), (N ↔ M), (E - 6 = Y), (R ↔ I), (T + 6 = Z), (I ↔ R), (A - 6 = U) → OMYIZRU
Hence, OMYIZRU is the correct answer.

FRENCH → (21 + 9 + 22 + 13 + 24 + 19) = 108, Number of letters = 6 → (108 + 6 = 114)
Similarly,

COURSE → (24 + 12 + 6 + 9 + 8 + 22) = 81, Number of letters = 6
Hence, the code would be = 81 + 6 = 87.

AND → (A + 2 = C) - (N - 2 = L, N + 2 = P) - (D + 2 = F) ⇒ (C - LP - F)
NOR → (N + 2 = P) - (O - 2 = M, O + 2 = Q) - (R + 2 = T) ⇒ (P - MQ - T)

Similarly,

BUT → (B + 2 = D) - (U - 2 = S, U + 2 = W) - T + 2 = V) ⇒ (D - SW - V)

Reversing CONDUCE it becomes ECUDNOC ⇒ (E ↔ V), (C ↔ X), (U ↔ F), (D ↔ W), (N ↔ M), (O ↔ L), (C ↔ X) → VXFWMLX

'NOSTALGIA = 9² = 81

Similarly,

'FRICTION' = 8² = 64

POETRY → EOPRTY (1067927)

Similarly,

PROFIT → FIOPRT (12186792)

Vowel = -7 in the positioning value and Consonant = +8 in the positioning value. So,

O → O - 7 = H

I → I - 7 = B

U → U - 7 = N

M → M + 8 = U

N → N + 8 = V

S → S + 8 = A
Hence, code for OMINOUS is HUBVHNA.

Break the letter in group of 3-1-3 letters and arrange them in the alphabetical order and then code vowels as per their alphabetical position and consonants as per their double alphabetical position.

PRIVATE becomes PRI-V-ATE, after the arrangement IPR-V-AET.

Coding it gives 9 - 32 - 36 - 44 - 1 - 5 - 40.

SHORTEN becomes SHO-R-TEN, after the arrangement HOS-R-ENT.

Coding it gives 16 - 15 - 38 - 36 - 5 - 28 - 40.

Similarly,

REFUSAL becomes REF-U-SAL, after the arrangement EFR-U-ALS.
Coding it gives 5 - 12 - 36 - 21 - 1 - 24 - 38.