Coding-Decoding Questions and Answers

Answer: D

Correct answer: 46

Each letter is worth twice its position in the alphabet, as Z = 26 × 2 = 52 confirms. Checking against the second clue, ACT = 1 + 3 + 20 = 24, and 24 × 2 = 48. So BAT = 2 + 1 + 20 = 23, and \[ 23 \times 2 = 46. \]

Answer: A

Correct answer: CAKNCA

Every letter moves four places back: J→F, O→K, S→O, E→A, P→L, H→D. GEORGE therefore gives G→C, E→A, O→K, R→N, G→C, E→A, that is CAKNCA. Since GEORGE has G and E twice each, the code must repeat C and A in the same places, which rules out three of the four options at a glance.

Answer: C

In given word, word is divided into three parts like
COM+PLE+TED, then these parts are written in reverse order as

MOC+ELP+DET

So,

DIRECTION will be DIR+ECT+ION,
which will be RIDTCENOI

Answer: C

Correct answer: LNTKCHMF

Both examples use the same rule, a shift of one place back: COULD gives BNTKC and MARGIN gives LZQFHM. MOULDING therefore becomes M→L, O→N, U→T, L→K, D→C, I→H, N→M, G→F. Two examples are given precisely so the rule can be confirmed rather than guessed from one.

Answer: C

Correct answer: SHFDQ

Each letter of the original is replaced by the letter immediately before it in the alphabet: M becomes L, O becomes N, and so on throughout.

Applying the same shift to TIGER gives S, H, F, D, Q.

Answer: A

Correct answer: QDFHS

Two operations are combined. Reverse MONKEY to get YEKNOM, then move each letter one place back: Y→X, E→D, K→J, N→M, O→N, M→L, giving XDJMNL. TIGER reversed is REGIT, and stepping each back gives R→Q, E→D, G→F, I→H, T→S, so the code is QDFHS.

Answer: B

Correct answer: MNUMNUMNU

The code is built from every third letter. BOMBAY has six letters, and taking the third and the sixth gives M and Y, written three times over as MYMYMY. TAMILNADU has nine, so the third, sixth and ninth are M, N and U, and the code is MNU repeated three times.

Answer: B

Correct answer: Sky

The question is what the colour of a clear sky is called in this language. A clear sky is blue, and blue is called sky, so the answer is sky. It is worth reading the chain in the right direction: sky is called yellow, which answers a different question altogether.

Answer: B

Correct answer: VXFFHVV

Each letter advances three places: V→Y, I→L, C→F, T→W, O→R, R→U, Y→B, the last wrapping past Z. SUCCESS gives S→V, U→X, C→F, C→F, E→H, S→V, S→V. The repeated letters again provide the check: the two C’s must give the same letter, and so must the three S’s.

Answer: A

Correct answer: EDRIRL

The shift increases along the word. FRIEND to HUMJTK is F+2, R+3, I+4, E+5, N+6, D+7. Applying the same increasing shift to CANDLE gives C+2=E, A+3=D, N+4=R, D+5=I, L+6=R, E+7=L, that is EDRIRL. A constant shift would not reproduce the example, so the differences must be worked out letter by letter.