Olympiad Test: Coding Decoding - 2 - Class 8 MCQ

BAT = 2 × 1 × 20 = 40
CAT = 3  × 1 × 20 = 60
∴ GOAT = 7 × 15 × 1 × 20 = 2100

In this code
Z = 1, Y = 2, X = 3, W = 4, O = 12,
B = 25, A = 26.
ZOO = 1  + 12 + 12 = 25.
GO = 20  + 12 = 32
GOAL = 20 + 12 + 26 + 15 = 73

ZEAL = 26 + 5 + 1 + 12 = 44.
MEAL =  13 + 5 + 1 + 12 = 31
SEAL = 1 9 + 5 + 1 + 12 = 37

Each letter of the word MEDICINE except first and last letter is moved one step forward and then the order of letters so obtained is reversed to get the code.
MEDICINE → MFEJDJE → EOJDJEFM
HONEST → HPOFTT → TTFOPH

The letter at the 3^rd and 6^th letter of the word BOMBAY is repeated thrice as MYMYMY. Similarly the word MADRAS is written as DSDSDS.

The letter in the first half and second half are written in reverse order.
SYSTEM →  SYSMET,
NEARER →  AENRER
BRIGHT → IRBTHG

All the letters of the given word except last letter are written in reverse order and in the group of letters so obtained each letter is moved two step forward.

VOTES → LBNKF

 MACHINE ⇒ 19 – 7 – 9 – 14 – 15  – 20 – 11
In this coding, 6 is added to the actual numbering of English alphabet.
ORANGE ⇒ 21 – 24 – 7 – 20 – 13 – 11.

ANSWER is coded as 5; FOUNDER is coded as 6; it means code is one less than number of letters in the word.
∴ Code for COMMUNICATION = 13 – 1
= 12