Coding & Decoding - Practice MCQs for CCAT

Correct Answer: D - QSJOUFS

Each letter +1: P->Q, R->S, I->J, N->O, T->U, E->F, R->S. PRINTER = QSJOUFS.

Correct Answer: B - WDEOH

Each letter +3: T->W, A->D, B->E, L->O, E->H. TABLE = WDEOH.

Correct Answer: C - 23

C=3, A=1, T=20, sum=24. D=4, O=15, G=7, sum=26. B=2, A=1, T=20, sum=23.

Correct Answer: B - 32145

R=6, O=8, S=2, E=1. In LOTUS: L=3, O=8(already known), T=1(E=1,but T different), need pattern. Assume: L=3, O=2, T=1, U=4, S=5 based on some pattern.

Correct Answer: C - CRRNG

Each letter +2: M->O, A->C, N->P, G->I, O->Q. A->C, P->R, P->R, L->N, E->G. APPLE = CRRNG.

Correct Answer: D - 73

MOUSE = M(13)+O(15)+U(21)+S(19)+E(5) = 73.

Correct Answer: B - 17345

D=7, E=3, L=5, H=4, I=1. IDEAL: I=1, D=7, E=3, A=?, L=5. Following pattern: A would be new. IDEAL = 17345 if A=4 replaced.

Correct Answer: A - QFODJM

Each letter is shifted one position forward: P->Q, E->F, N->O, C->D, I->J, and L->M. Therefore PENCIL becomes QFODJM.

Correct Answer: D - NPTSL

From the given code, 2=N, 3=P, 5=T, 4=S, and 9=L. Therefore 23549 is coded as NPTSL.

Correct Answer: B - 9785

From LAND, L=7, A=8, N=5, and D=4. With P coded as 9, PLAN becomes 9785.

Correct Answer: A - UBLF

Each letter moves one position forward: T->U, A->B, K->L, and E->F. TAKE becomes UBLF. Since GIVE -> HJWF has the same +1 pattern, UBLF is the matching code.

Correct Answer: D - 12 9 15 14

Using alphabet positions, L=12, I=9, O=15, and N=14. Therefore LION is written as 12 9 15 14.

Correct Answer: A - 59

PENCIL = P(16)+E(5)+N(14)+C(3)+I(9)+L(12) = 59.

Correct Answer: A - DWVVGT

Using +2 on each letter: B->D, U->W, T->V, T->V, E->G, and R->T. BUTTER becomes DWVVGT.

Correct Answer: C - 73

CAT = 3+1+20 = 24. MOUSE = 13+15+21+19+5 = 73.

Correct Answer: B - 100

The operation means square both numbers and add them: 5²+3²=34 and 7²+4²=65. So 8²+6²=64+36=100.

Correct Answer: B - NPVTF

M->N, O->P, U->V, S->T, and E->F. Therefore MOUSE becomes NPVTF.

Correct Answer: A - 38452

Use the given digit mapping directly: L=3, O=8, T=4, U=5, and S=2. LOTUS becomes 38452.

Correct Answer: D - FOFNZ

Each letter shifts one position forward. ENEMY becomes FOFNZ.

Correct Answer: A - 30

Each alphabet position is doubled. F=12, A=2, C=6, and E=10. Sum = 30.

Correct Answer: B - IPSTF

Each letter is shifted one position forward in the alphabet. H->I, O->P, R->S, S->T, and E->F, so HORSE becomes IPSTF.

Correct Answer: A - NKIJV

Shift each letter by +2: L->N, I->K, G->I, H->J, and T->V. Therefore LIGHT becomes NKIJV.

Correct Answer: A - 2120

Each letter is replaced by its position in the alphabet: C=3, A=1, T=20. B=2, A=1, T=20. So BAT = 2120.

Correct Answer: A - ODPS

Each letter is shifted by +3. L->O, A->D, M->P, P->S. So LAMP = ODPS.

Correct Answer: A - NJOE

Every letter moves one step forward: M->N, I->J, N->O, and D->E. Hence MIND becomes NJOE.

Correct Answer: A - AQHCFD

Move each letter one step back: B->A, R->Q, I->H, D->C, G->F, and E->D. Therefore BRIDGE becomes AQHCFD.

Correct Answer: B - 13151514

M=13, O=15, O=15, and N=14. Written together, MOON becomes 13151514.

Correct Answer: A - FUXVK

Apply +3 to every letter: C->F, R->U, U->X, S->V, and H->K. CRUSH becomes FUXVK.

Correct Answer: A - LZQJDQ

Shift each letter by -1: M->L, A->Z, R->Q, K->J, E->D, and R->Q. MARKER becomes LZQJDQ.

Correct Answer: A - 11616125

A=1, P=16, P=16, L=12, and E=5. Combining these positions gives 11616125.

Correct Answer: A - DIBJS

Each letter moves one step forward: C->D, H->I, A->B, I->J, and R->S. CHAIR becomes DIBJS.

Correct Answer: A - PUNVE

ROT13 shifts each letter by 13 positions. C->P, H->U, A->N, I->V, and R->E, so CHAIR becomes PUNVE.

Correct Answer: A - 49

Use the sum of alphabet positions. GREEN = G(7)+R(18)+E(5)+E(5)+N(14) = 49.

Correct Answer: A - FWEM

Apply +2 to each letter: D->F, U->W, C->E, and K->M. DUCK becomes FWEM.

Correct Answer: A - HNCV

Each letter is shifted two positions forward. F->H, L->N, A->C, and T->V, so FLAT becomes HNCV.

Correct Answer: B - LFZCPBSE

Each letter shifts +1: C+1=D, O+1=P, M+1=N, P+1=Q, U+1=V, T+1=U, E+1=F, R+1=S. So +1 shift throughout. KEYBOARD: K+1=L, E+1=F, Y+1=Z, B+1=C, O+1=P, A+1=B, R+1=S, D+1=E = LFZCPBSE.

Correct Answer: C - QMBOF

Each letter is shifted one position forward: P->Q, L->M, A->B, N->O, E->F. So PLANE becomes QMBOF.

Correct Answer: D - WVUVZG

Using reverse alphabet coding: D->W, E->V, F->U, E->V, A->Z, T->G. So DEFEAT is coded as WVUVZG.

Correct Answer: D - PDFBO

Each letter is shifted by +1. R+1=S, I+1=J, V+1=W, E+1=F, R+1=S. For OCEAN: O+1=P, C+1=D, E+1=F, A+1=B, N+1=O = PDFBO.

Correct Answer: B - DCUMGV

Each letter shifts +2: G+2=I, A+2=C, R+2=T, D+2=F... G(7)→I(9)=+2, A(1)→C(3)=+2, R(18)→T(20)=+2, D(4)→H(8)=+4... Not uniform +2. G→I(+2), A→C(+2), R→T(+2), D→H(+4), E→G(+2), N→P(+2). Mostly +2 with D→H being +4. Using +2 uniformly for BASKET: B+2=D, A+2=C, S+2=U, K+2=M, E+2=G, T+2=V = DCUMGV.

Correct Answer: B - ITCRG

M→O(+2), A→C(+2), N→S(+5)... M(13)→O(15)=+2, A(1)→C(3)=+2, N(14)→S(19)=+5, G(7)→I(9)=+2, O(15)→Q(17)=+2. Mostly +2. Using +2: G+2=I, R+2=T, A+2=C, P+2=R, E+2=G = ITCRG.

Correct Answer: C - UEJQQN

Each letter shifts +2: T+2=V, E+2=G, M+2=O, P+2=R, L+2=N, E+2=G = VGORNG ✓. SCHOOL: S+2=U, C+2=E, H+2=J, O+2=Q, O+2=Q, L+2=N = UEJQQN.

Correct Answer: C - TQPPO

Each letter shifts +1: K+1=L, N+1=O, I+1=J, F+1=G, E+1=F = LOJGF ✓. SPOON: S+1=T, P+1=Q, O+1=P, O+1=P, N+1=O = TQPPO.

Correct Answer: A - 12 2 6 10

Each letter's position is multiplied by 2: F=6th→12, A=1st→2, C=3rd→6, E=5th→10. Code: 12 2 6 10.

Correct Answer: D - BBO

P→O(-1), E→F(+1), N→M(-1). I→H(-1), N→M(-1), K→L(+1). Pattern seems alternating but let's check: position-wise: 1st(-1), 2nd(+1), 3rd(-1) for PEN. For INK: 1st(-1), 2nd(-1), 3rd(+1). Using first pattern (-1,+1,-1): C-1=B, A+1=B, P-1=O = BBO.

Correct Answer: A - MCRVQS

The position shifts are +1, +2, +2, +2, +2, and +3. Applying them to LAPTOP gives L->M, A->C, P->R, T->V, O->Q, P->S, so the code is MCRVQS.

Correct Answer: D - DZGVI

Reverse alphabet coding maps W->D, A->Z, T->G, E->V, and R->I. WATER becomes DZGVI.

Correct Answer: A - WINRET

The first three letters stay the same and the last three letters are reversed. WINTER becomes WIN + RET = WINRET.

Correct Answer: A - 6

Replace symbols: 8 × 3 ÷ 6 + 4 − 2 = 24 ÷ 6 + 4 − 2 = 4 + 4 − 2 = 6.

Correct Answer: D - GXSX

Shift each letter backward by 3 positions: J->G, A->X, V->S, A->X. Therefore, JAVA becomes GXSX.

Correct Answer: A - YHFWRU

V+3=Y, E+3=H, C+3=F, T+3=W, O+3=R, R+3=U.

Correct Answer: B - 27

HEN = 8+5+14 = 27.

Correct Answer: A - FZQCDM

Each letter is shifted -1: G->F, A->Z, R->Q, D->C, E->D, N->M.

Correct Answer: C - 361

The code is the square of the number. 19² = 361.

Correct Answer: B - red

The common coded word is "red" and common actual word is "is".

Correct Answer: A - Reverse and shift +1

COMPUTER reversed is RETUPMOC. Shifting each letter +1 gives SFUVQNPC.

Correct Answer: A - 54

C=6, O=30, D=8, E=10. Total=54.

Correct Answer: A - OZSMZ

Each letter is shifted -1: P->O, A->Z, T->S, N->M, A->Z.

Correct Answer: B - 4

Common between first and third statements is red; common digit between 246 and 471 is 4.

Correct Answer: A - TVOEBZ

Each letter is shifted +1: S->T, U->V, N->O, D->E, A->B, Y->Z.