Q1): In a certain code, the 1st letter is shifted +1, the 2nd letter +2, the 3rd letter +3, and so on. If CLOUD is coded as DNRYI, then how will STONE be coded?
A) TVRRJ
B) TVRSJ
C) UWRSJ
D) TVQQJ
Answer: A) TVRRJ
Explanation: In this coding, each letter is shifted forward by its position in the word.
S(+1) → T, T(+2) → V, O(+3) → R, N(+4) → R, E(+5) → J.
So, STONE becomes T V R R J, which is TVRRJ.
Q2): In a certain code language, each vowel is replaced by the next vowel (A→E→I→O→U→A) and each consonant is replaced by the next consonant (skipping vowels). How will NETWORK be coded?
A) PIVXUSL
B) PIVXUTL
C) QIVXUSL
D) PIVWUSL
Answer: A) PIVXUSL
Explanation: Apply the rule letter by letter.
N → P (next consonant after N; O is vowel so skip it), E → I (next vowel), T → V (skip U), W → X, O → U, R → S, K → L.
So, NETWORK becomes P I V X U S L = PIVXUSL.
Q3): In a certain code, letters in odd positions are shifted +1 and letters in even positions are shifted −1. If TEACHER is coded as UDBBIDS, then how will STUDENT be coded?
A) TSVCFMU
B) TTVBFMU
C) TSVDFNU
D) USVCFMU
Answer: A) TSVCFMU
Explanation: Apply the rule position-wise.
Odd positions +1: S→T, U→V, E→F, T→U.
Even positions −1: T→S, D→C, N→M.
So, STUDENT becomes T S V C F M U = TSVCFMU.
Q4): Using reverse alphabet coding (A↔Z, B↔Y, C↔X, …), how will CAT be coded?
A) XZG
B) XZH
C) WZG
D) YAG
Answer: A) XZG
Explanation: In reverse alphabet coding:
C ↔ X, A ↔ Z, T ↔ G.
So, CAT becomes X Z G = XZG.
Q5): In a certain code, each letter is replaced by its alphabetical position and then 1 is added to each number. If BIRD is written as 3-10-19-5, then how will FISH be written?
A) 7-10-20-9
B) 6-9-19-8
C) 8-10-21-9
D) 7-11-20-10
Answer: A) 7-10-20-9
Explanation: Write positions and add 1.
F=6→7, I=9→10, S=19→20, H=8→9.
So FISH becomes 7-10-20-9.
Q6): In a certain code language:
- “hard work wins” is coded as “@ # $”
- “work brings success” is coded as “# % &”
- “wins brings reward” is coded as “$ % !”
Which symbol represents “brings”?
A) #
B) %
C) $
D) &
Answer: B) %
Explanation: The word brings appears in the 2nd and 3rd statements.
Common symbols in “# % &” and “$ % !” is only %.
So, brings = %.
Q7): In a certain coding, letters are swapped in pairs: 1st↔2nd, 3rd↔4th, and so on. If SURE is coded as USER, then how will PLANE be coded?
A) LPNAE
B) LPN AE
C) LPAEN
D) PNLAE
Answer: A) LPNAE
Explanation: Swap adjacent pairs:
PLANE → (P↔L) gives LP, (A↔N) gives NA, E remains same.
So the code is LPNAE.
Q8): In a certain code, the word is first reversed and then each letter is shifted +1. If TIME is coded as FNJU, then how will NOTE be coded?
A) FUPO
B) FTPO
C) GVQP
D) ETON
Answer: A) FUPO
Explanation: Reverse NOTE → ETON.
Shift each letter +1: E→F, T→U, O→P, N→O.
So NOTE becomes FUPO.
Q9): In a certain code, letters in odd positions are shifted +1 and letters in even positions are shifted −1 (alternating). If HOUSE is coded as INVRF, then how will MONEY be coded?
A) NNODZ
B) NMOCZ
C) NNP DZ
D) NMODZ
Answer: A) NNODZ
Explanation: Apply +1, −1 alternation:
M(+1)=N, O(−1)=N, N(+1)=O, E(−1)=D, Y(+1)=Z.
So MONEY becomes NNODZ.
Q10): A word is coded by writing the absolute differences between the alphabetical positions of consecutive letters (A1–Z26). If KING is coded as 2-5-7, then how will LORD be coded?
A) 3-3-14
B) 3-4-14
C) 4-3-14
D) 3-3-13
Answer: A) 3-3-14
Explanation: Write positions: L=12, O=15, R=18, D=4.
Differences: |12−15|=3, |15−18|=3, |18−4|=14.
So LORD becomes 3-3-14.
Q11): In a certain code, each letter is replaced by its opposite letter (A↔Z, B↔Y, …) and then the whole word is reversed. If CAT is coded as GZX, then how will DOG be coded?
A) TLW
B) WLT
C) TMW
D) SLW
Answer: A) TLW
Explanation: First do opposite letters: D→W, O→L, G→T, so DOG becomes WLT.
Now reverse it: WLT → TLW.
Q12): In a certain code, the alphabetical positions of the letters are written and then arranged in ascending order. If SALT is coded as 1-12-19-20, then how will MATH be coded?
A) 1-8-13-20
B) 1-13-8-20
C) 8-1-13-20
D) 1-8-14-20
Answer: A) 1-8-13-20
Explanation: Positions: M=13, A=1, T=20, H=8.
Arrange ascending: 1, 8, 13, 20.
So MATH becomes 1-8-13-20.
Q13): In a code, letters are replaced by their reverse alphabetical positions (A=26, B=25, …, Z=1). If BAT is coded as 25-26-7, then how will NET be coded?
A) 13-22-7
B) 14-21-7
C) 13-21-8
D) 12-22-7
Answer: A) 13-22-7
Explanation: Reverse positions mean value = 27 − (normal position).
N is 14 → 27−14=13, E is 5 → 27−5=22, T is 20 → 27−20=7.
So NET becomes 13-22-7.
Q14): A word is coded as: (Number of letters × 2) + (Number of vowels). If BOOK is coded as 10, then how will TEACH be coded?
A) 11
B) 12
C) 13
D) 14
Answer: B) 12
Explanation: TEACH has 5 letters, so 5×2 = 10.
Vowels in TEACH are E and A, so vowels = 2.
Total code = 10 + 2 = 12.
Q15): In a certain code, each letter is shifted forward by the number of letters in the word. If APPLE is coded as FUUQJ, then how will MANGO be coded?
A) RFSLT
B) QERKT
C) RGSLU
D) RFSMT
Answer: A) RFSLT
Explanation: MANGO has 5 letters, so shift each letter +5.
M→R, A→F, N→S, G→L, O→T.
So MANGO becomes RFSLT.
Q16): If KHOOR means HELLO in a certain code, then what does ZRUOG mean?
A) WORLD
B) WOULD
C) WORTH
D) WORRY
Answer: A) WORLD
Explanation: KHOOR → HELLO shows each letter is shifted +3 in the code.
So to decode, shift each letter −3: Z→W, R→O, U→R, O→L, G→D.
Thus ZRUOG means WORLD.
Q17): In a certain code, vowels are replaced by numbers (A=1, E=2, I=3, O=4, U=5), consonants remain as they are, and then the whole result is reversed. How will AUDIO be coded?
A) 43D51
B) 15D34
C) 34D15
D) 45D31
Answer: A) 43D51
Explanation: Replace vowels: A=1, U=5, I=3, O=4 and keep D as D.
So AUDIO becomes 1 5 D 3 4 → “15D34”.
Now reverse it: “15D34” → 43D51.
Q18): In a certain code, the word is reversed first and then each letter is shifted one step backward (A becomes Z). If GATE is coded as DSZF, then how will ROAD be coded?
A) CZNQ
B) BZNQ
C) CZMP
D) DZOQ
Answer: A) CZNQ
Explanation: Reverse ROAD → DAOR.
Shift each letter backward by 1: D→C, A→Z, O→N, R→Q.
So ROAD becomes CZNQ.
Q19): In a certain code, letters in odd positions are shifted +1, letters in even positions are shifted −1, and then the word is reversed. If GREAT is coded as UZFQH, then how will SMART be coded?
A) UQBLT
B) TLBQU
C) UQBMT
D) VQBLT
Answer: A) UQBLT
Explanation: First apply shifts on SMART:
S(+1)=T, M(−1)=L, A(+1)=B, R(−1)=Q, T(+1)=U → “TLBQU”.
Now reverse “TLBQU” → UQBLT.
Q20): In a certain number code, letters in odd positions are written as their normal alphabetical positions, but letters in even positions are written as (27 − position). If ACE is coded as 1-24-5, then how will BDFG be coded?
A) 2-23-6-20
B) 2-24-6-19
C) 25-23-21-20
D) 2-22-6-20
Answer: A) 2-23-6-20
Explanation: BDFG positions are B=2, D=4, F=6, G=7.
Odd positions use normal: 1st → 2, 3rd → 6.
Even positions use 27−position: 2nd → 27−4=23, 4th → 27−7=20.
So BDFG becomes 2-23-6-20.