Coding and Decoding
1.JAK, KBL, LCM, MDN, _____
A. OEP
B. NEO
C. MEN
D. PFQ
Answer:: Option B
Explanation::
This is an alternating series in alphabetical order. The middle letters follow the order ABCDE. The first and third letters are alphabetical beginning with J. The third letter is repeated as a first letter in each subsequent three-letter segment.
2.BCB, DED, FGF, HIH, ___
A. JKJ
B. HJH
C. IJI
D. JHJ
Answer:: Option A
Explanation::
This series consists of a simple alphabetical order with the first two letters of all segments: B, C, D, E, F, G, H, I, J, K. The third letter of each segment is a repetition of the first letter.
3.P5QR, P4QS, P3QT, _____, P1QV
A. PQW
B. PQV2
C. P2QU
D. PQ3U
Answer:: Option C
Explanation::
The first two letters, PQ, are static. The third letter is in alphabetical order, beginning with R. The number series is in descending order beginning with 5.
4. QAR, RAS, SAT, TAU, _____
A. UAV
B. UAT
C. TAS
D. TAT
Answer:: Option A
Explanation::
In this series, the third letter is repeated as the first letter of the next segment. The middle letter, A, remains static. The third letters are in alphabetical order, beginning with R.
5. DEF, DEF2, DE2F2, _____, D2E2F3
A. DEF3
B. D3EF3
C. D2E3F
D. D2E2F2
Answer:: Option D
Explanation::
In this series, the letters remain the same: DEF.
The subscript numbers follow this series:
111, 112, 122, 222, 223, 233, 333, …
6. SCD, TEF, UGH, ____, WKL
A. CMN
B. UJI
C. VIJ
D. IJT
Answer:: Option C
Explanation::
There are two alphabetical series here. The first series is with the first letters only: STUVW. The second series involves the remaining letters: CD, EF, GH, IJ, KL.
7. B2CD, _____, BCD4, B5CD, BC6D
A. B2C2D
B. BC3D
C. B2C3D
D. BCD7
Answer:: Option B
Explanation::
Because the letters are the same, concentrate on the number series, which is a simple 2, 3, 4, 5, 6 series, and follows each letter in order.
8. FAG, GAF, HAI, IAH, ____
A. JAK
B. HAL
C. HAK
D. JAI
Answer:: Option A
Explanation::
The middle letters are static, so concentrate on the first and third letters. The series involves an alphabetical order with a reversal of the letters. The first letters are in alphabetical order: F, G, H, I , J. The second and fourth segments are reversals of the first and third segments. The missing segment begins with a new letter.
9. ELFA, GLHA, ILJA, _____, MLNA
A. OLPA
B. KLMA
C. LLMA
D. KLLA
Answer:: Option D
Explanation::
The second and forth letters in the series, L and A, are static. The first and third letters consist of an alphabetical order beginning with the letter E.
10. CMM, EOO, GQQ, _____, KUU
A. GRR
B. GSS
C. ISS
D. ITT
Answer:: Option C
Explanation::
The first letters are in alphabetical order with a letter skipped in between each segment: C, E, G, I, K. The second and third letters are repeated; they are also in order with a skipped letter: M, O, Q, S, U.
11. ZA5, Y4B, XC6, W3D, _____
A. E7V
B. V2E
C. VE5
D. VE7
Answer:: Option D
Explanation::
There are three series to look for here. The first letters are alphabetical in reverse: Z, Y, X, W, V. The second letters are in alphabetical order, beginning with A. The number series is as follows: 5, 4, 6, 3, 7.
12. QPO, NML, KJI, _____, EDC
A. HGF
B. CAB
C. JKL
D. GHI
Answer:: Option A
Explanation::
This series consists of letters in a reverse alphabetical order.
