Olympiad Test: Coding Decoding - 1 - Class 8 MCQ

In this code, a letter is the nth letter from the beginning of English alphabet then in the code the corresponding letter is the nth letter from the end.
HAND → SZMW
then MILK → NROP

Position of letters in English alphabet
AT = 1 + 20 = 21.
CAT = 3 + 1 + 20 = 24
MAT = 13 + 1 + 20 = 34

Hence,
NAGPUR → GPAUNR
123456         342516
STRONG → ROTNSG
123456         3425 16

In this code, the last letter is as it is in the code. The first letters of the word are divided in two groups of three letters each. In each group the two letters are written in reverse order.

AT = 1 × 20 = 20
CAT = 3 × 1 × 20 = 60
MAT = 1 3 × 1 × 20 = 260

In this code,
Z = 2, Y = 3, X = 4, W = 5, ……… 
N = 14, C = 25, B = 26, A = 27.
ZIP = (Z  + I + P) × 6
= (2 + 19 + 12) × 6 = 198
ZAP = (Z  + A + P) × 6
= (2 + 27 + 12) × 6 = 246
VIP = (V  + I + P) × 6
= (6 + 19 + 12) × 6 = 222.