Letter and Symbol Series Questions and Answers

Q: Choose the correct alternative to complete the series.AZBY, CXDW, EVFU, ______

The next term is GTHS.Each term alternates letters from the two ends of the alphabet. The 1st and 3rd letters run forward, A B, C D, E F, so next come G and H. The 2nd and 4th run backward, Z Y, X W, V U, so next come T and S.Interleaved, that is G T H S. GXHW repeats X and W from the second term, and SHTG and STHO reverse or scramble the pattern.

Q: Number of letters skipped in between adjacent letters in the series decreases by one. Which of the following series observes this rule ?

The series is EJNQST.Count the letters skipped between neighbours: E to J skips F, G, H, I (4); J to N skips K, L, M (3); N to Q skips O, P (2); Q to S skips R (1); S to T skips none (0). The gaps fall by one each time: 4, 3, 2, 1, 0.BGKNPR gives 4, 3, 2, 1, 1, so it breaks at the end. CINRTU starts with 5, 4, 3 and then skips only 1. LQUXAP gives 4, 3, 2 and then jumps irregularly round the alphabet.When counting gaps, count only the letters strictly between each pair; E and J, for example, have four letters between them, not five.

Q: In the following series, the number of letters skipped in between the adjacent letters are in ascending order i.e. 1, 2, 3, 4. Which one of the following letter groups does not obey this rule ?

The group that does not obey the rule is HJMPT.Count the skipped letters: H to J skips I (1), J to M skips K, L (2), but M to P skips only N, O (2) again, and P to T skips Q, R, S (3). The gaps 1, 2, 2, 3 are not 1, 2, 3, 4.The other three follow the rule exactly. CEHLQ: 1 (D), 2 (F, G), 3 (I, J, K), 4 (M, N, O, P). DFIMR and GILPU give the same 1, 2, 3, 4 pattern.The key is to count only the letters strictly between each pair, not the two letters themselves.

Q: What will be the next term in the series ? BKS, DJJ, FIU, ______

The Commission's key is None of these, because the series as printed does not fix its last letter.Take the three letters of each term by their alphabet ranks:\[ \begin{aligned} \text{BKS}&: 2, 11, 19 \\ \text{DJJ}&: 4, 10, 10 \\ \text{FIU}&: 6, 9, 21 \end{aligned} \]The first letters rise by 2 (B, D, F, then H) and the second letters fall by 1 (K, J, I, then H), so the next term begins HH. The third letters S, J, U follow no rule as printed, so no third letter can be derived.HJU and HBA fail already on the second letter. HHV would be right only if DJJ is a misprint of DJT, which would make the third letters S, T, U and the next one V. That is a guess about the printing, and the Commission's key treats the printed series as it stands, so None of these is the keyed answer.

Important Instructions

141.

Choose the correct alternative to complete the series.

AZBY, CXDW, EVFU, ______

A.SHTG
B.STHO
C.GTHS
D.GXHW

Exam Year(s)

Tripura Public Service Commission - 2026,

Answer: C

The next term is GTHS.

Each term alternates letters from the two ends of the alphabet. The 1st and 3rd letters run forward, A B, C D, E F, so next come G and H. The 2nd and 4th run backward, Z Y, X W, V U, so next come T and S.

Interleaved, that is G T H S. GXHW repeats X and W from the second term, and SHTG and STHO reverse or scramble the pattern.

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142.

Number of letters skipped in between adjacent letters in the series decreases by one. Which of the following series observes this rule ?

A.BGKNPR
B.CINRTU
C.EJNQST
D.LQUXAP

Exam Year(s)

Tripura Public Service Commission - 2019,

Answer: C

The series is EJNQST.

Count the letters skipped between neighbours: E to J skips F, G, H, I (4); J to N skips K, L, M (3); N to Q skips O, P (2); Q to S skips R (1); S to T skips none (0). The gaps fall by one each time: 4, 3, 2, 1, 0.

BGKNPR gives 4, 3, 2, 1, 1, so it breaks at the end. CINRTU starts with 5, 4, 3 and then skips only 1. LQUXAP gives 4, 3, 2 and then jumps irregularly round the alphabet.

When counting gaps, count only the letters strictly between each pair; E and J, for example, have four letters between them, not five.

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143.

In the following series, the number of letters skipped in between the adjacent letters are in ascending order i.e. 1, 2, 3, 4. Which one of the following letter groups does not obey this rule ?

A.CEHLQ
B.DFIMR
C.GILPU
D.HJMPT

Exam Year(s)

Tripura Public Service Commission - 2019,

Answer: D

The group that does not obey the rule is HJMPT.

Count the skipped letters: H to J skips I (1), J to M skips K, L (2), but M to P skips only N, O (2) again, and P to T skips Q, R, S (3). The gaps 1, 2, 2, 3 are not 1, 2, 3, 4.

The other three follow the rule exactly. CEHLQ: 1 (D), 2 (F, G), 3 (I, J, K), 4 (M, N, O, P). DFIMR and GILPU give the same 1, 2, 3, 4 pattern.

The key is to count only the letters strictly between each pair, not the two letters themselves.

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144.

What will be the next term in the series ? BKS, DJJ, FIU, ______

A.HJU
B.HHV
C.HBA
D.None of these

Exam Year(s)

Tripura Public Service Commission - 2019,

Answer: D

The Commission's key is None of these, because the series as printed does not fix its last letter.

Take the three letters of each term by their alphabet ranks:

\[ \begin{aligned} \text{BKS}&: 2, 11, 19 \\ \text{DJJ}&: 4, 10, 10 \\ \text{FIU}&: 6, 9, 21 \end{aligned} \]

The first letters rise by 2 (B, D, F, then H) and the second letters fall by 1 (K, J, I, then H), so the next term begins HH. The third letters S, J, U follow no rule as printed, so no third letter can be derived.

HJU and HBA fail already on the second letter. HHV would be right only if DJJ is a misprint of DJT, which would make the third letters S, T, U and the next one V. That is a guess about the printing, and the Commission's key treats the printed series as it stands, so None of these is the keyed answer.

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Letter and Symbol Series Questions and Answers

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