Coding Decoding Aptitude MCQ Questions with Answers Set 04

Answer: (a) HOCLILK

Explanation:
1. Number CURTAIN 1 to 7; CAITURN is the order 1 5 6 4 2 3 7.
2. HILLOCK = H1 I2 L3 L4 O5 C6 K7; order 1 5 6 4 2 3 7 gives HOCLILK.

Teacher's Note:
1. When the code uses the same letters as the word, number the letters 1, 2, 3 ... and write the order they appear in.
2. Apply that position order, not the letters themselves, to the new word.

Answer: (d) RMTS

Explanation:
1. ROSE to TSYM: R+2 = T, O+4 = S, S+6 = Y, E+8 = M.
2. PINK: P+2 = R, I+4 = M, N+6 = T, K+8 = S, giving RMTS.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.

Answer: (a) URCOANT

Explanation:
1. Number IMPEACH 1 to 7; CHIMAPE is the order 6 7 1 2 5 3 4.
2. CONTAUR = C1 O2 N3 T4 A5 U6 R7; order 6 7 1 2 5 3 4 gives URCOANT.

Teacher's Note:
1. When the code uses the same letters as the word, number the letters 1, 2, 3 ... and write the order they appear in.
2. Apply that position order, not the letters themselves, to the new word.

Answer: (d) DAIVEC

Explanation:
1. CONSULT to OCSNLUT: each pair of letters is swapped (CO to OC, NS to SN, UL to LU), T stays.
2. ADVICE: AD to DA, VI to IV, CE to EC, giving DAIVEC.

Teacher's Note:
1. When the code uses the same letters as the word, number the letters 1, 2, 3 ... and write the order they appear in.
2. Apply that position order, not the letters themselves, to the new word.

Answer: (a) IRUZNKY

Explanation:
1. TAILOR to ZGORUX: every letter moves 6 places forward (T to Z, A to G).
2. CLOTHES + 6: C to I, L to R, O to U, T to Z, H to N, E to K, S to Y, giving IRUZNKY.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.

Answer: (a) 68938

Explanation:
1. From GUEST: S = 6, T = 8, U = 3. From HOUSE: O = 9 (U = 3 and S = 6 again).
2. STOUT = S T O U T = 6 8 9 3 8.

Teacher's Note:
1. Make a small letter-to-code table from the given words; most questions need no rule at all.
2. Look at the options and check only the positions where they differ, to save time.

Answer: (d) KNXQH

Explanation:
1. WINDOW to ZHQBRT: odd places move 3 forward (W to Z, N to Q, O to R); even places move 1, 2, 3 back (I to H, D to B, W to T).
2. HOUSE: H+3 = K, O-1 = N, U+3 = X, S-2 = Q, E+3 = H, giving KNXQH.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.

Answer: (b) B8C5A3A11A5E4

Explanation:
1. Each letter is written as a letter and a number whose product is its position: B = 2 = A(1) x 2, A = A1, G = 7 = A(1) x 7.
2. P = 16 = B(2) x 8, O = 15 = C(3) x 5, C = A3, K = A11, E = A5, T = 20 = E(5) x 4.
3. Only B8C5A3A11A5E4 fits every letter.

Teacher's Note:
1. For number codes, try letter positions first: sum, product, or each position plus or minus a fixed value.
2. Test your rule on the whole given word before using it on the new one.

Answer: (c) 8172156

Explanation:
1. APPLE positions 1, 16, 16, 12, 5 become 2, 15, 17, 11, 6: add 1 and subtract 1 alternately.
2. GRAPE positions 7, 18, 1, 16, 5 become 8, 17, 2, 15, 6, giving 8172156.

Teacher's Note:
1. For number codes, try letter positions first: sum, product, or each position plus or minus a fixed value.
2. Test your rule on the whole given word before using it on the new one.

Answer: (c) CHIK

Explanation:
1. 'I' is in sentences 1 and 4; the only common code is CHIK.
2. (Also EAT = WIC from sentences 1 and 2, and YOU = NIC from 2 and 4.)

Teacher's Note:
1. Compare two sentences that share exactly one word; the code they share is that word's code.
2. If two words always appear together, their codes cannot be told apart, so the answer is 'cannot be determined'.

Answer: (d) cannot be determined

Explanation:
1. THEY, DRINK and COFFEE appear only in the third sentence.
2. Its codes HOP, BOP, TOP cannot be matched to these words individually, so the code for COFFEE cannot be determined.

Teacher's Note:
1. Compare two sentences that share exactly one word; the code they share is that word's code.
2. If two words always appear together, their codes cannot be told apart, so the answer is 'cannot be determined'.

Answer: (d) None (cannot be determined)

Explanation:
1. IS = RAM (sentences 1, 2, 4) and RED = BAM (sentences 1, 3).
2. GREEN is TAM or SAM (GRASS has the other); BLOOD is GAM or YAM (THICK has the other): neither is fixed.
3. So the code for GREEN BLOOD cannot be determined.

Teacher's Note:
1. Compare two sentences that share exactly one word; the code they share is that word's code.
2. If two words always appear together, their codes cannot be told apart, so the answer is 'cannot be determined'.

Answer: (c) BAM

Explanation:
1. RED appears in sentences 1 and 3; their only common code is BAM.
2. So RED = BAM.

Teacher's Note:
1. Compare two sentences that share exactly one word; the code they share is that word's code.
2. If two words always appear together, their codes cannot be told apart, so the answer is 'cannot be determined'.

Answer: (b) OTAUHR

Explanation:
1. Number POETRY 1 to 6; REPOTY is the order 5 3 1 2 4 6.
2. AUTHOR = A1 U2 T3 H4 O5 R6; order 5 3 1 2 4 6 gives OTAUHR.

Teacher's Note:
1. When the code uses the same letters as the word, number the letters 1, 2, 3 ... and write the order they appear in.
2. Apply that position order, not the letters themselves, to the new word.

Answer: (d) AREMAC

Explanation:
1. OIDUTS is STUDIO written backwards.
2. CAMERA written backwards is AREMAC.

Teacher's Note:
1. Always test for a simple reversal first.
2. Read the code from right to left to check it quickly.

Answer: (d) GJMP

Explanation:
1. E+1 = F, G+2 = I, I+3 = L, K+4 = O.
2. FHJL: F+1 = G, H+2 = J, J+3 = M, L+4 = P, giving GJMP.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (d) RTQS

Explanation:
1. Each letter moves 4 places forward: B to F, D to H, A to E, C to G.
2. NPMO + 4 = RTQS.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (a) CZEB

Explanation:
1. 1st and 3rd letters move 2 forward; 2nd and 4th move 2 back (N to P, O to M, P to R, Q to O).
2. ABCD: A to C, B to Z, C to E, D to B, giving CZEB.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (c) GHIJ

Explanation:
1. Each letter moves 5 places forward: F to K, G to L, H to M, I to N.
2. BCDE + 5 = GHIJ.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (b) QUVZ

Explanation:
1. Each letter moves 10 places forward: A to K, E to O, F to P, J to T.
2. GKLP + 10 = QUVZ.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (a) RNJZ

Explanation:
1. T+5 = Y, A+5 = F, L-4 = H, K-4 = G.
2. MIND: M+5 = R, I+5 = N, N-4 = J, D-4 = Z, giving RNJZ.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (b) YXZ

Explanation:
1. EDC is CDE written in reverse order.
2. So the answer is ZXY written in reverse order: YXZ.

Teacher's Note:
1. When the third term is the first term rearranged, rearrange the second term the same way.
2. Check reversal before trying letter shifts.

Answer: (d) KDSM

Explanation:
1. 1st and 3rd letters move 5 forward, 2nd and 4th move 5 back: K to P, O to J, R to W, T to O.
2. FINR: F to K, I to D, N to S, R to M, giving KDSM.

Teacher's Note:
1. In letter analogies, find the step from each letter of the first group to the matching letter of the second.
2. Steps often follow a pattern such as +1, +2, +3 or alternate forward and backward moves.

Answer: (d) SUETSNDT

Explanation:
1. Number COLLEGE 1 to 7; CLEEGLO is the order 1 3 5 7 6 4 2: odd places left to right, then even places right to left.
2. STUDENTS (8 letters): odd places 1 3 5 7 = S U E T, then even places 8 6 4 2 = S N D T.
3. Code = SUETSNDT.

Teacher's Note:
1. When the code uses the same letters as the word, number the letters 1, 2, 3 ... and write the order they appear in.
2. Apply that position order, not the letters themselves, to the new word.

Answer: (b) OZSMZ

Explanation:
1. Each letter is replaced by the letter before it (D to C, A to Z).
2. PATNA: P to O, A to Z, T to S, N to M, A to Z, giving OZSMZ.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.

Answer: (b) CNMD

Explanation:
1. F to E, I to H, R to Q, E to D: each letter is replaced by the previous letter.
2. DONE: D to C, O to N, N to M, E to D, giving CNMD.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.

Answer: (a) EJGGJDVMU

Explanation:
1. M to N, O to P, V to W, E to F: each letter is replaced by the next letter.
2. DIFFICULT + 1 = EJGGJDVMU.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.

Answer: (b) IPUFM

Explanation:
1. W to X, H to I, I to J, L to M, E to F: each letter moves one place forward.
2. HOTEL: H to I, O to P, T to U, E to F, L to M, giving IPUFM.

Teacher's Note:
1. Write the alphabet with position numbers (A=1 ... Z=26) once on rough paper; it makes every shift instant.
2. Check the shift on two or three letters of the given pair before applying it, and remember Z wraps round to A.